Commit Graph

136 Commits

Author SHA1 Message Date
Christopher Faylor 8f8eeb70ba * child_info.h (cygheap_exec_info::sigmask): Declare new field.
* cygheap.cc (init_cygheap::find_tls): Rename threadlist_ix -> ix.  Only take
one pass through thread list, looking for eligible threads to signal.  Set a
new param indicating that function has found a sigwait* mask.
* cygheap.h (init_cygheap::find_tls): Reflect new parameter.
* dcrt0.cc (parent_sigmask): New variable.
(child_info_spawn::handle_spawn): Save parent's signal mask here.
(dll_crt0_1): Restore parent's signal mask to tls sigmask as appropriate.  Call
sig_dispatch_pending to flush signal queue when we can finally do something
with signals.
* exceptions.cc (sigpacket::process): Avoid attempting to handle signals if we
haven't finished initializing.  Rely on the fact that find_tls will do mask
checking and don't do it again.  Delete ill-named 'dummy' variable.
* sigproc.cc (cygheap_exec_info::alloc): Save calling thread's signal mask in
new sigmask field.
(wait_sig): Try to debug when WFSO fails and DEBUGGING is defined.
* thread.cc (pthread::set_tls_self_pointer): Make this a true automatic method
rather than inexplicably relying on a thread parameter.
(pthread::thread_init_wrapper): Accommodate set_tls_self_pointer change to
non-static.  Initialize sigmask before setting tid or suffer signal races.
* ehread.h (pthread::set_tls_self_pointer): Make non-static, delete parameter.
2013-03-31 12:35:44 +00:00
Christopher Faylor bc837d22f3 Throughout, update copyrights to reflect dates which correspond to main-branch
checkins.  Regularize copyright format.
2013-01-21 04:38:31 +00:00
Christopher Faylor 98f16610ca * thread.cc (pthread_rwlock::lookup_reader): Remove parameter: always assume
that we're looking for the current thread.
(pthread_rwlock::tryrdlock): Eliminate self variable.  Accommodate change in
lookup_reader().
(pthread_rwlock::unlock): Ditto.
(pthread_rwlock::rdlock): Ditto.  Move add_reader call after writer tests to
more closely mimic old behavior.
(pthread_rwlock::wrlock): Accommodate change in lookup_reader().
* thread.h ((pthread_rwlock::lookup_reader): Eliminate argument.
2013-01-07 19:34:44 +00:00
Christopher Faylor 8f3f61eb96 * thread.cc (pthread_rwlock::add_reader): Perform new operation here and return
pointer to allocated RWLOCK_READER structure.
(pthread_rwlock::rdlock): Reorganize to reflect new add_reader functionality.
(pthread_rwlock::tryrdlock): Ditto.  Remove unneeded call to lookup_reader().
* thread.h (pthread_rwlock::RWLOCK_READER::RWLOCK_READER): New constructor.
(pthread_rwlock::add_reader): Reflect new functionality.
2013-01-07 16:01:10 +00:00
Corinna Vinschen a94555ec0f * thread.h (List_insert): Cast first parameter in
InterlockedCompareExchangePointer call to avoid compiler warnings.
	(List_remove): Ditto.
2012-10-23 10:17:29 +00:00
Christopher Faylor 806e732c01 Rename cancelable_wait -> cygwait throughout.
* DevNotes: Add entry cgf-000015.
* cygwait.h (cygwait): Don't allow an optional PLARGE_INTERGER argument.
2012-08-15 19:07:42 +00:00
Christopher Faylor 962f9a2ccc * DevNotes: Add entry cgf-000013.
* cygserver_ipc.h (ipc_set_proc_info): Use _cygtls::ipc_set_proc_info to set
per-thread signal arrived value.
* cygthread.cc (cygthread::detach): Use per-thread signal_arrived via
set_thread_waiting.
* fork.cc (_cygtls::fixup_after_fork): Clear signal_arrived.
(_cygtls::remove): Close any signal_arrived handle when thread exists.
(_cygtls::find_tls): Remove unneeded function.
* cygtls.h: Update copyright.
(class _cygtls): Reorganize to help avoid rebuilding newlib when structure
changes.
(_cygtls::event): Delete.
(_cygtls::threadkill): Ditto.
(_cygtls::signal_waiting): Declare new bool.
(_cygtls::find_tls): Delete declaration.
(_cygtls::set_threadkill): Ditto.
(_cygtls::reset_threadkill): Ditto.
(_cygtls::set_signal_arrived): Declare new function.
(class set_thread_waiting): Declare new class.
* cygwait.cc (cw_nowait_storage): Define.
(cygwait): Set per-thread signal_arrived via set_thread_waiting.  Don't
special-case _main_tls.
* cygwait.h (cw_nowait): Define.
(cw_infinite): Ditto.
(cygwait): Redefine pathological wait-only case.
* dcrt0.cc (dll_crt0_0): Remove call to now-defunct events_init().
(dll_crt0_1): Remove call to now-defunct create_signal_arrived().
* exceptions.cc: Reflect set_signal_mask() argument reordering throughout.
Remove signal mask synchronization throughout.
(events_init): Delete definition.
(mask_sync): Delete now-unneeded mask synchronization.
(set_signal_mask): Reverse order of arguments to "standard" to, from layout.
Rename "newmask" argument to "setmask".  Remove debugging.
(sig_handle_tty_stop): Use cancelable_wait rather than WFMO.
(_cygtls::interrupt_setup): Don't treat "threadkill" events specially.
Conditionally set signal_arrived depending on whether the thread has created it
or not.
(sigpacket::process): Reorganize to reflect thread-specific sending of signals
which is more in line with the way it was actually supposed to work.
* fhandler_socket.cc (get_inet_addr): Use cancelable_wait rather than
IsEventSignalled to avoid potential race.
(fhandler_socket::wait_for_events): Set signal_arrived event using
set_thread_waiting().
(fhandler_socket::close): Use cygwait for the case of just waiting 10 ms for a
signal.
* fhandler_tape.cc (fhandler_dev_tape::_lock): Use cancelable_wait rather than
WFMO.  Redo switch/case tests accordingly.
* fhandler_termios.cc (fhandler_termios::bg_check): Use cygwait for case of
just waiting 0 ms for a potential signal.
* fhandler_tty.cc (fhandler_pty_master::process_slave_output): Use
cancelable_wait rather than WFSO.
* fhandler_windows.cc (fhandler_windows::read): Set per-thread signal_arrived
via set_thread_waiting().
* flock.cc (lf_setlock): Ditto.
* select.cc (pselect): Ditto.  Set per-thread signal_arrived using
set_thread_waiting().
* gendef: Don't special case handling of _cygtls::sig for threads.
* gentls_offsets: Use #pragma once in tlsoffsets.h.
* ntdll.h: Use #pragma once.
* poll.cc: Reflect set_signal_mask() argument reordering.
* posix_ipc.cc (ipc_mutex_lock): Use cancelable_wait rather than WFMO.
(ipc_cond_timedwait): Set perl-thread signal arrived using
set_thread_waiting().
* security.h: Use #pragma once.
* signal.cc (abort): Reflect set_signal_mask() argument reordering.
(clock_nanosleep): Ditto.  Change call to cancelable_wait to properly specify
handling of cancel and interrupt.
(sigwaitinfo): Remove handling of per-thread event in favor of per-thread
signal_arrived.  Use cancelable_wait rather than WFSO.
* sigproc.cc (signal_arrived): Delete definition.
(create_signal_arrived): Ditto.
* sigproc.h (signal_arrived): Delete declaration.
(set_signal_mask): Avoid defining as a "C" function.  Don't conditionally
declare.
(create_signal_arrived): Delete declaration.
* syscalls.cc (rename): Use cygwait() rather than WFSO.
* thread.h (fast_mutex::lock): Use cw_infinite rather than LARGE_NULL.
* wait.cc (wait4): Ditto.
* thread.cc (pthread_mutex::lock): Ditto.
(pthread::join): Ditto.
(semaphore::_wait): Ditto.
(pthread_kill): Remove set_threadkill() accommodation.
* tlsoffsets.h: Regenerate.
2012-07-21 22:58:20 +00:00
Christopher Faylor 978441cc0e * cygwait.h (LARGE_NULL): Define.
(cancelable_wait): Define variant which accepts DWORD time argument.
(cygwait): Use cancelable_wait with DWORD argument.
(cygwait): Use cancelable_wait with DWORD argument and cw_sig_eintr for
timeout-only case.
* exceptions.cc (handle_sigsuspend): Use LARGE_NULL as second argument to
distinguish between cancelable_wait variants.
* thread.cc (pthread_mutex::lock): Ditto.
(pthread::join): Ditto.
(semaphore::_timedwait): Ditto.
* thread.h (fast_mutex::lock): Ditto.
* wait.cc (wait4): Ditto.
2012-06-19 00:52:59 +00:00
Christopher Faylor 2addde8cb1 Revert errneous checkin.
Check in actual change associated with ChangeLog.
2012-06-19 00:38:02 +00:00
Christopher Faylor 4ae6378382 Add '#include "cygwait.h"' throughout, where appropriate.
* DevNotes: Add entry cgf-000012.
* Makefile.in (DLL_OFILES): Add cygwait.o.
* sigproc.h: Remove cygwait definitions.
* cygwait.h: New file.  Define/declare Cygwin waitfor functions.
* cygwait.cc: Ditto.
* exceptions.cc: Include cygwait.h.
(handle_sigsuspend): Accommodate change in cancelable_wait arguments.
(sigpacket::process): Display thread tls in debugging output.
* fhandler.cc (fhandler_base_overlapped::wait_overlapped): Use symbolic names
for signal and cancel return.
* fhandler_console.cc (fhandler_console::read): Ditto.
(fhandler_dev_dsp::Audio_out::waitforspace): Ditto.
fhandler_dev_dsp::Audio_in::waitfordata): Ditto.
* fhandler_fifo.cc (fhandler_fifo::wait): Ditto.
* fhandler_serial.cc (fhandler_serial::raw_read): Ditto.
* fhandler_tty.cc (fhandler_pty_slave::read): Ditto.
* select.cc (cygwin_select): Ditto.
* wait.cc (wait4): Ditto.
* thread.cc (cancelable_wait): Move definition to cygwait.h.
(pthread_cond::wait): Accommodate change in cancelable_wait arguments.
(pthread_mutex::lock): Ditto.
(pthread_spinlock::lock): Ditto.
(pthread::join): Ditto.
(pthread::thread_init_wrapper): Display tls in debugging output.
(semaphore::_timedwait): Ditto.
* thread.h (cw_sig_wait): Move to cygwait.h.
(cw_cancel_action): Delete.
(cancelable_wait): Move declaration to cygwait.h.
2012-06-17 20:50:24 +00:00
Corinna Vinschen d7bcd2a16f * Makefile.in (clean): Remove non-existant regexp dir.
* collate.h: New header.
	(__collate_range_cmp): Declare.
	(__collate_load_error): Define.
	* glob.cc: Pull in latest version from FreeBSD.  Simplify and reduce
	Cygwin-specific changes.
	* regex/regcomp.c: Include collate.h on Cygwin as well.
	(__collate_range_cmp): Move from here...
	* nlsfuncs.cc (__collate_range_cmp): ...to here.

	* miscfuncs.cc (thread_wrapper): Fix typo in comment.
	(CygwinCreateThread): Take dead zone of Windows stack into account.
	Change the way how the stack is commited and how to handle guardpages.
	Explain how and why.
	* thread.h (PTHREAD_DEFAULT_STACKSIZE): Change definition.  Explain why.
2012-02-13 13:12:37 +00:00
Corinna Vinschen ce48510394 * miscfuncs.cc (DEFAULT_STACKSIZE): Remove.
(CygwinCreateThread): Simplify code by assuming that now stack-related
	input values are undefined.  Set stack protection to PAGE_READWRITE,
	as is default on Windows.  Add lengthy comment to explain POSIX
	guardpage.
	* thread.cc (pthread_attr::pthread_attr): Initialize stacksize as
	PTHREAD_DEFAULT_STACKSIZE.  Initialize guardsize as
	PTHREAD_DEFAULT_GUARDSIZE.
	* thread.h (PTHREAD_DEFAULT_STACKSIZE): Define.  Add comment to explain.
	(PTHREAD_DEFAULT_GUARDSIZE): Define.
2012-02-11 17:37:02 +00:00
Christopher Faylor 0e1f0840d2 Update copyright on all files checked in so far this year.
* fhandler.h: Use #pragma once rather than ifdef guards.
(fhandler_console::tc_getpgid): Return our pgid if we have never opened a
console.
* fork.cc: Rearrange includes to accommodate fhandler.h use of pinfo.h.
* sigproc.cc: Ditto.
* spawn.cc: Ditto.
(child_info_spawn::worker): Query myself->pgid rather than calling expensive
function.
* thread.h: Use #pragma once rather than ifdef guards.
* pinfo.h: Use #pragma once rather than ifdef guards.
(pinfo::remember): Don't define if sigproc.h has not been included.
(pinfo::reattach): Ditto.
* sigproc.h: Use #pragma once rather than ifdef guards.  Use different test to
see if pinfo.h has been included.
2012-01-11 19:07:11 +00:00
Corinna Vinschen 929a140824 * thread.cc (pthread::pthread): Drop setting parent_tls. Call
sigprocmask to copy parent thread signal mask into new parent_sigmask
	member.
	(pthread::thread_init_wrapper): Copy _my_tls.sigmask from new
	parent_sigmask member.
	* thread.h (class pthread): Drop parent_tls.  Add parent_sigmask.
2011-08-24 15:18:17 +00:00
Yaakov Selkowitz f0968c1e7e * cygtls.h (struct _local_storage): Add cw_timer member.
* cygtls.cc (_cygtls::init_thread): Initialize locals.cw_timer.
(_cygtls::fixup_after_fork): Ditto.
* tlsoffsets.h: Regenerate.
* ntdll.h (enum _TIMER_INFORMATION_CLASS): Define.
(struct _TIMER_BASIC_INFORMATION): Define.
(NtQueryTimer): Declare function.
* thread.h (cancelable_wait): Change timeout argument to
PLARGE_INTEGER and provide NULL default.
(fast_mutex::lock): Adjust accordingly.
(pthread_cond::wait): Change timeout argument to PLARGE_INTEGER
and default to NULL.
* thread.cc (cancelable_wait): Change timeout argument to
PLARGE_INTEGER.  Initialize _cygtls.locals.cw_timer if needed.
Use NT waitable timers for handling timeout.  Return remaining time
to timeout argument if timeout was relative.
(pthread_cond::wait): Change timeout argument to PLARGE_INTEGER.
Adjust to change in cancelable_wait.
(pthread_mutex::lock): Adjust to change in cancelable_wait.
(pthread_spinlock::lock): Ditto.
(pthread::join): Ditto.
(__pthread_cond_dowait): Change waitlength argument to PLARGE_INTEGER.
Adjust to changes in cancelable_wait and pthread_cond::wait.
(pthread_cond_timedwait): Adjust to change in __pthread_cond_dowait.
(pthread_cond_wait): Ditto.
(semaphore::_timedwait): Adjust to change in cancelable_wait.
(semaphore::_wait): Ditto.
* exceptions.cc (handle_sigsuspend): Ditto.
* signal.cc (nanosleep): Ditto.
* wait.cc (wait4): Ditto. Fix copyright dates.
* times.cc (FACTOR, NSPERSEC): Move from here...
* hires.h (FACTOR, NSPERSEC): ...to here.
2011-08-03 16:40:48 +00:00
Yaakov Selkowitz 8a7b0a00df * cygwin.din (pthread_condattr_getclock): Export.
(pthread_condattr_setclock): Export.
* posix.sgml (std-notimpl): Move pthread_condattr_getclock and
pthread_condattr_setclock from here...
(std-susv4): ... to here.
* sysconf.cc (sca): Set _SC_CLOCK_SELECTION to _POSIX_CLOCK_SELECTION.
* thread.cc: (pthread_condattr::pthread_condattr): Initialize clock_id.
(pthread_cond::pthread_cond): Initialize clock_id.
(pthread_cond_timedwait): Use clock_gettime() instead of gettimeofday()
in order to support all allowed clocks.
(pthread_condattr_getclock): New function.
(pthread_condattr_setclock): New function.
* thread.h (class pthread_condattr): Add clock_id member.
(class pthread_cond): Ditto.
* include/pthread.h: Remove obsolete comment.
(pthread_condattr_getclock): Declare.
(pthread_condattr_setclock): Declare.
* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
2011-07-21 09:39:22 +00:00
Corinna Vinschen cdb4231369 * cygwin.din (pthread_attr_getguardsize): Export.
(pthread_attr_setguardsize): Export.
	(pthread_attr_setstack): Export.
	(pthread_attr_setstackaddr): Export.
	* init.cc (dll_entry): Remove wow64_test_stack_marker.  Check for
	unusual stack address by testing stack addresses from current TEB.
	Check validity of _my_tls by testing if it's within the stack as
	given in current TEB.
	* miscfuncs.cc (struct thread_wrapper_arg): New structure used to
	push all required information to thread_wrapper function.
	(thread_wrapper): Wrapper function for actual thread function.
	If an application stack has been given, change %ebp and %esp so that
	the thread function runs on that stack.  If the thread has been created
	by CygwinCreateThread, set up the POSIX guard pages if necessary.
	(CygwinCreateThread): New function.
	* miscfuncs.h (CygwinCreateThread): Declare.
	* ntdll.h (struct _TEB): Define all members up to Peb.
	* posix.sgml (std-susv4): Move pthread_attr_getguardsize,
	pthread_attr_setguardsize and pthread_attr_setstack here.
	(std-deprec): Add pthread_attr_setstackaddr.
	* sysconf.cc (sca): Set _SC_THREAD_ATTR_STACKADDR to
	_POSIX_THREAD_ATTR_STACKADDR.
	* thread.cc (pthread::precreate): Copy pthread_attr stackaddr and
	guardsize members.
	(pthread::create): Call CygwinCreateThread.
	(pthread_attr::pthread_attr): Initialize guardsize.
	(pthread_attr_setstack): New function.
	(pthread_attr_setstackaddr): New function.
	(pthread_attr_setguardsize): New function.
	(pthread_attr_getguardsize): New function.
	(pthread_getattr_np): Copy attr.guardsize.
	* thread.h (pthread_attr): Add member guardsize.
	* include/pthread.h (pthread_attr_getguardsize): Declare.
	(pthread_attr_setguardsize): Declare.
	* include/cygwin/version.h: Bump API minor number.
2011-05-15 18:49:40 +00:00
Christopher Faylor 9d2b7928b5 * thread.h (pthread::static_cancel_self): Mark as noreturn.
(pthread::cancel_self): Ditto.
* thread.cc (pthread::cancel_self): Explicitly use pthread::exit to avoid a
"function returns" error.
2011-05-04 06:16:59 +00:00
Yaakov Selkowitz 705a187ee9 * cygwin.din (pthread_attr_getstack): Export.
(pthread_attr_getstackaddr): Export.
(pthread_getattr_np): Export.
* ntdll.h (enum _THREAD_INFORMATION_CLASS): Add ThreadBasicInformation.
(struct _THREAD_BASIC_INFORMATION): Define.
(NtQueryInformationThread): Declare.
* posix.sgml (std-susv4): Add pthread_attr_getstack.
(std-gnu): Add pthread_getattr_np.
(std-deprec): Add pthread_attr_getstackaddr.
(std-notimpl): Remove pthread_attr_[gs]etstackaddr, as they were
removed from SUSv4.
* thread.cc (pthread_attr::pthread_attr): Initialize stackaddr.
(pthread_attr_getstack): New function.
(pthread_attr_getstackaddr): New function.
(pthread_attr_setstacksize): Return EINVAL if passed size less than
PTHREAD_STACK_MIN, as required by POSIX.
(pthread_getattr_np): New function.
* thread.h (class pthread_attr): Add stackaddr member.
* include/pthread.h (pthread_attr_getstack): Declare.
(pthread_attr_getstackaddr): Declare unconditionally.
(pthread_attr_setstack): Declare inside false conditional for reference.
(pthread_getattr_np): Declare.
* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
2011-05-03 01:13:37 +00:00
Corinna Vinschen a91ac4dca9 * fhandler_windows.cc (fhandler_windows::read): Use
pthread::get_cancel_event to fetch thread's cancel event.
	* flock.cc (lf_setlock): Ditto.
	* posix_ipc.cc (ipc_cond_timedwait): Ditto.
	* thread.cc (pthread::get_cancel_event): New static method.
	* thread.h (pthread::get_cancel_event): Declare.
2011-05-01 17:42:41 +00:00
Corinna Vinschen 42faed4128 * thread.h (class pthread): Add bool member canceled.
* thread.cc (pthread::pthread): Initialize canceled to false.
	(pthread::cancel): Set canceled before setting cancel_event.
	(pthread::testcancel): Check for canceled.  Only wait for cancel_event
	if canceled is true.  Explain why.
	(pthread::_fixup_after_fork): Set canceled to false.
2011-04-30 10:20:25 +00:00
Corinna Vinschen f00fe1b8e7 * cygwin.din (pthread_spin_destroy): Export.
(pthread_spin_init): Export.
	(pthread_spin_lock): Export.
	(pthread_spin_trylock): Export.
	(pthread_spin_unlock): Export.
	* posix.sgml (std-susv4): Add pthread_spin_destroy, pthread_spin_init,
	pthread_spin_lock, pthread_spin_trylock, pthread_spin_unlock.
	(std-notimpl): Remove pthread_spin_[...].
	* pthread.cc (pthread_spin_init): New function.
	* thread.cc (pthread_spinlock::is_good_object): New function.
	(pthread_mutex::pthread_mutex): Rearrange initializers to accommodate
	protected data in pthread_mutex.
	(pthread_spinlock::pthread_spinlock): New constructor.
	(pthread_spinlock::lock): New method.
	(pthread_spinlock::unlock): New method.
	(pthread_spinlock::init): New method.
	(pthread_spin_lock): New function.
	(pthread_spin_trylock): New function.
	(pthread_spin_unlock): New function.
	(pthread_spin_destroy): New function.
	* thread.h (PTHREAD_SPINLOCK_MAGIC): Define.
	(class pthread_mutex): Change access level of members shared with
	derived classes to protected.
	(pthread_mutex::set_shared): New protected method.
	(class pthread_spinlock): New class, derived class of pthread_mutex.
	* include/pthread.h (pthread_spin_destroy): Declare.
	(pthread_spin_init): Declare.
	(pthread_spin_lock): Declare.
	(pthread_spin_trylock): Declare.
	(pthread_spin_unlock): Declare.
	* include/cygwin/types.h (pthread_spinlock_t): New typedef.
	* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
2011-03-29 10:32:40 +00:00
Corinna Vinschen 056b8e60cd * thread.cc (semaphore::init, destroy, close): Standards conformance
fix.  On a failure, return -1 and set errno.
	* thread.h (semaphore::terminate): Save errno since semaphore::close()
	may now modify it.
2011-03-29 07:49:25 +00:00
Christopher Faylor 478ea460eb * include/sys/strace.h: Define _STRACE_SPECIAL.
(strace_printf_wrap): Fix NOSTRACE definitions.
(strace_printf_wrap1): Fix NOSTRACE definitions.
(special_printf): Define.
* thread.cc: Perform minor syntax fix in a comment.  Rename
"is_good_initialzer*" to "is_initializer*" throughout.  Use pthread_printf
rather than debug_printf throughout.  Add extra pthread_printf debugging
throughout.
(pthread_mutex::_new_mutex): New constant value.
(pthread_mutex::_unlocked_mutex): Ditto.
(pthread_mutex::_destroyed_mutex): Ditto.
(pthread_mutex::no_owner): Define new function.
(pthread_mutex::can_be_unlocked): Detect no_owner situation.  Handle
PTHREAD_MUTEX_NORMAL as a special case.
(pthread::create_cancel_event): Use C++ boolean values.
(pthread::precreate): Use method to set mutex type.
(pthread_cond::pthread_cond): Ditto.
(pthread_rwlock::pthread_rwlock): Ditto.
(pthread_mutex::pthread_mutex): Set owner to _new_mutex initially.
(pthread_mutex::~pthread_mutex): Reset various elements to make it clearer if
they are incorrectly reused.
(pthread_mutex::lock): Add clarifying comment.
(pthread_mutex::unlock): Attempt to handle various mutex types correctly.  In
particular, reinstate ability to have one thread unlock another thread's mutex
if type == PTHREAD_MUTEX_NORMAL.
(semaphore::_fixup_after_fork): Avoid redundancy.
(pthread_mutex::_fixup_after_fork): Ditto.  Fix debugging statement.
(__pthread_cond_dowait): Accommodate changes to remove previously inexplicable
use can_be_unblocked() as a static function.
* thread.h: Rename "is_good_initialzer*" to "is_initializer*" throughout.
(pthread_mutex): Reorganize.  Make many things private.
(pthread_mutex::no_owner): Define new method.
(pthread_mutex::_new_mutex): Define new constant.
(pthread_mutex::_unlocked_mutex): Ditto.
(pthread_mutex::_destroyed_mutex): Ditto.
2010-02-22 20:36:04 +00:00
Christopher Faylor 2b1407d372 * pthread.cc (pthread_mutex_init): Explicitly fill out third arg to
pthread_mutex::init.
* thread.cc: Remov some obsolete comments.
(verifyable_object_isvalid): Reflect change to use thread_magic_t for magic
numbers.
(pthread_mutex::pthread_mutex): Set magic number to invalid initially until
we've verified that everything is valid.
(pthread_mutex::unlock): Fix a comment.
(verifyable_object::verifyable_object): Delete here.
(~verifyable_object::~verifyable_object): Ditto.
(pthread_mutex::init): Don't run is_good_initializer for non-static objects.
* thread.h (thread_magic_t): New typedef.
(verifyable_object::verifyable_object): Use thread_magic_t;
(verifyable_object::magic): Ditto.
(pthread_mutex::is_good_initializer_or_bad_object): Remove unneeded variable
names.
(pthread_mutex::can_be_unlocked): Ditto.
(pthread_mutex::init): Ditto.  Remove default for third argument.
2010-02-12 20:07:13 +00:00
Christopher Faylor 3700578ee8 * dcrt0.cc (_dll_crt0): Set _main_tls as early as possible.
* thread.cc (pthread_mutex::can_be_unlocked): Remove check for
MUTEX_OWNER_ANONYMOUS since it is racy and unsafe.
(pthread::init_mainthread): Initialize thread directly from _my_tls.
(pthread::self): Ditto.
(pthread::get_tls_self_pointer): Delete.
(pthread_mutex::pthread_mutex): Use an event rather than a semaphore.
(pthread_mutex::lock): Rename from _<func>.  Derive self directly.
(pthread_mutex::tryunlock): Ditto.
(pthread_mutex::destroy): Ditto.
(pthread_mutex::unlock): Ditto.  Accommodate change from semaphore to event.
(pthread_mutex::_fixup_after_fork): Accommodate change from semaphore to event.
(pthread_mutex::init): Don't attempt to initialize a semaphore unless it is in
an initialized state.  Do this check under mutex_initialization_lock.lock
* thread.h (fast_mutex::init): Use event rather than semaphore.
(fast_mutex::lock): Ditto.
(pthread_mutex::_lock): Delete.
(pthread_mutex::_unlock): Ditto.
(pthread_mutex::_trylock): Ditto.
(pthread_mutex::_destroy): Ditto.
(pthread_mutex::get_pthread_self): Ditto.
(pthread_mutex::get_tls_self_pointer): Ditto.
(pthread_mutex::lock): Un-inline.
(pthread_mutex::unlock): Ditto.
(pthread_mutex::trylock): Ditto.
(pthread_mutex::destroy): Ditto.
2010-02-10 07:25:26 +00:00
Christopher Faylor b4fa816474 * select.h: New file split from fhandler.h.
(select_record::select_record): Define do-nothing constructor for "new" to
avoid gratuitous zeroing.
(select_info): New base class.
(select_pipe_info): New class with methods for dealing with pipes.
(select_socket_info): New class with methods for dealing with sockets.
(select_serial_info): Dummy class for serial.
(select_mailslot_info): Dummy class for mailslots.
(select_stuff): Define device_specific_* as actual classes rather than void *.
* dtable.h (dtable::select_read): Accommodate return value change to 'bool' and
argument change to "select_stuff".
(dtable::select_write): Ditto.
(dtable::select_except): Ditto.
* dtable.cc (dtable::select_read): Accommodate return value change to 'bool'
and argument change to "select_stuff".
(dtable::select_write): Ditto.
(dtable::select_except): Ditto.
* fhandler.h: Excise select-related classes.
(fhandler_*::select_read): Change argument to select_stuff.
(fhandler_*::select_write): Ditto.
(fhandler_*::select_except): Ditto.
* select.cc (UNIX_FD_ZERO): Use memset rather than bzero.
(select_stuff::test_and_set): Change return type to bool.  Allocate
select_record on entry and let fhandler_*::select_* operate on the start.next
field of select_stuff.
(pipeinf): Delete.
(select_pipe_info::select_pipe_info): New constructor.  Allocates event for
controlling pipe waits.
(select_pipe_info::~select_pipe_info): New destructor.  Destroy event.  Stop
thread.
(select_pipe_info::add_watch_handle): New function.
(thread_pipe): Wait for the hEvent part of any overlapped pipes before peeking.
(start_thread_pipe): Don't allocate device_specific_pipe stuff here.  Assume
that it has been allocated earlier.
(pipe_cleanup): Rely on select_pipe_info destructor to clean up pipe
paraphenalia.
(fhandler_*::select_*): Derive select_record from new select_stuff argument.
(fhandler_pipe::select_*): Ditto.  Allocate pipe-specific field if not already
allocated.
(serialinf): Delete.
(thread_serial): serialinf -> select_serial_info.
(fhandler_base::ready_for_read): Rewrite to accommodate change in argument to
fhandler_*::select_*.
(socketinf): Delete.
(thread_socket): socketinf -> select_socket_info.
(mailslotinf): Delete.
(thread_mailslot): mailslotinf -> select_mailslot_info.
2009-06-30 21:18:44 +00:00
Corinna Vinschen f8190b5705 * thread.h (struct pthread_rwlock::RWLOCK_READER): Add counter n.
* thread.cc (pthread_rwlock::rdlock): If a thread already owns a
	read lock, just count the number of locks for it, per SUSv4.
	(pthread_rwlock::tryrdlock): Ditto.
	(pthread_rwlock::unlock): If a thread has more than one concurrent
	read locks, just count down.
2009-01-20 12:40:31 +00:00
Christopher Faylor 66a83f3eac Remove unneeded header files from source files throughout. Update copyrights
where appropriate.
* globals.cc: New file for generic global variables.
* mkglobals_h: New file to generate globals.h.
* mkstatic: New Script used to build a (currently non-working) static
libcygwin_s.a.
* Makefile.in: Add unused rule to build a non-working libcygwin_s.a.
(DLL_OFILES): Add globals.o.  Make all objects rely on globals.h.
(globals.h): New target.  Generate globals.h.
* cygtls.h: Honor new CYGTLS_HANDLE define to control when the HANDLE operator
is allowed in _cygtls.
* dcrt0.cc: Move most globals to globals.cc.
* init.cc: Ditto.
* environ.cc (strip_title_path): Remove now-unneeded extern.
* fhandler_serial.cc (fhandler_serial::open): Ditto.
* pinfo.cc: Ditto.
(commune_process): Ditto.
* shared.cc: Ditto.
* glob.cc: Ditto.
* strace.cc: Ditto.
* exceptions.cc: Define CYGTLS_HANDLE before including winsup.h.
* path.cc (stat_suffixes): Move here.
* security.h: Add forward class path_conv declaration.
* smallprint.cc (__small_vsprintf): Make a true c++ function.
(__small_sprintf): Ditto.
(small_printf): Ditto.
(console_printf): Ditto.
(__small_vswprintf): Ditto.
(__small_swprintf): Ditto.
* spawn.cc (spawn_guts): Remove _stdcall decoration in favor of regparm.
(hExeced): Move to globals.cc
* strfuncs.cc (current_codepage): Ditto.
(active_codepage): Ditto.
* sync.cc (lock_process::locker): Move here from dcrt0.cc.
* syscalls.cc (stat_suffixes): Move to path.cc.
* tty.cc (tty::create_master): Uncapitalize fatal warning for consistency.
* winsup.h: Include globals.h to declare most of the grab bag list of globals
which were previously defined here.
* mount.h: Move USER_* defines back to shared_info.h.
* speclib: Force temporary directory cleanup.
2009-01-03 05:12:22 +00:00
Corinna Vinschen a7d2cc16e2 * Fix copyright dates. 2008-04-01 13:22:47 +00:00
Christopher Faylor 70300fdb1c Perform whitespace cleanup throughout.
* dcrt0.cc (signal_shift_subtract): Eliminate ancient backwards compatibility.
(check_sanity_and_sync): Ditto.
* winsup.h (SIGTOMASK): Ditto.  Just use constant in signal calculation.
* include/cygwin/version: Remove backwards signal mask compatibility define.
* path.cc (symlink_info::check_sysfile): Cosmetic change.
* registry.cc (get_registry_hive_path): Remove unneeded variable.
* exceptions.cc (handle_sigsuspend): Eliminate thread signal mask and use
either main sigmask or current thread sigmask.
(set_process_mask): Ditto.
(sighold): Ditto.
(sigrelse): Ditto.
(sigset): Ditto.
(set_process_mask_delta): Ditto.
(_cygtls::call_signal_handler): Ditto.
* fhandler_process.cc (format_process_status): Ditto.
* fhandler_termios.cc (fhandler_termios::bg_check): Ditto.
* pinfo.h (class pinfo): Ditto.
* select.cc (pselect): Ditto.
* signal.cc (sigprocmask): Ditto.
(abort): Ditto.
(sigpause): Ditto.
(sigsend): Ditto.
(wait_sig): Ditto.
* thread.h (pthread::parent_tls): New member.
* thread.cc (pthread::pthread): Record parent_tls here.
(pthread::thread_init_wrapper): Initialize sigmask from parent thread.
2008-02-15 17:53:11 +00:00
Corinna Vinschen a1591d3be7 Drop old SetResourceLock stuff in favor of mutos.
* dcrt0.cc (_reslock): Remove.
	(__cygwin_user_data): Accommodate removal of resourcelocks member.
	(dll_crt0_0): Don't initialize resourcelocks.
	* exceptions.cc (_cygtls::signal_exit): Drop resourcelocks handling.
	* mmap.cc (mmap_guard): New muto.
	(LIST_LOCK): Define.
	(LIST_UNLOCK): Define.
	(mmap_list::search_record): Remove.
	(mmap_list::try_map): Include code for anonymous case from
	mmap_list::search_record.
	(mmap_is_attached_or_noreserve): Access bookkeeping lists in a thread
	safe way.
	(mmap64): Replace SetResourceLock/ReleaseResourceLock by
	LIST_LOCK/LIST_UNLOCK.  Lock at the latest possible point.
	(munmap): Replace SetResourceLock/ReleaseResourceLock by
	LIST_LOCK/LIST_UNLOCK.
	(msync): Ditto.
	(mprotect): Ditto.
	* thread.cc (ResourceLocks::Lock): Remove.
	(SetResourceLock): Remove.
	(ReleaseResourceLock): Remove.
	(ResourceLocks::Init): Remove.
	(ResourceLocks::Delete): Remove.
	* thread.h (SetResourceLock): Drop declaration.
	(ReleaseResourceLock): Ditto.
	(class ResourceLocks): Drop definition.
	* include/sys/cygwin.h (class ResourceLocks): Drop forward declaration.
	(struct per_process): Replace resourcelocks with additional unused2
	element.
	(per_process_overwrite): Accommodate above change.
2007-11-27 14:45:14 +00:00
Christopher Faylor 39fc0d36ae * dcrt0.cc (child_info_fork::alloc_stack_hard_way): Change sense of guard test.
Increase size of stack reserved and increase size before the current stack
pointer.  Use pointers when doing arithmetic.
(dll_crt0_1): Initialize exception handler when we notice we're the child of a
fork from non-main thread.
* fork.cc (frok::parent): Make argument volatile.
(frok::child): Ditto.
(lock_signals): New class.
(lock_pthread): Ditto.
(hold_everhthing): Ditto.
(frok::parent): Move atforkprepare and atforkparent to lock_pthread class.
(fork): Make ischild boolean.  Use hold_everything variable within limited
scope to set various mutexes in such a way as to avoid deadlocks.
* thread.h (pthread_mutex::tid): New variable, active when debugging for
tracking thread id of owner.
(pthread_mutex::set_owner): Set tid when debugging.
* thread.cc (pthread_mutex::pthread_mutex): Clear tid.
(pthread_mutex::_unlock): Ditto when unlocking.
(pthread_mutex::fixup_after_fork): Set tid to special value after forking since
owner is unknown.
2007-02-22 12:34:55 +00:00
Corinna Vinschen 8fbd574ef0 * cygwin.din (sem_unlink): Export.
* posix_ipc.cc: Include thread.h and semaphore.h.  Remove TODO
	comment.
	(ipc_names): Add max_len member.  Set to maximum length of the path
	before tacking on the prefix path.  Set prefix path for named semaphors
	to /dev/shm, as on Linux.
	(enum ipc_type_t): Change sem to semaphore to avoid name conflicts.
	(check_path): Detect empty paths.  Use ipc_names's max_len member.
	Use __small_sprintf to create full object path name.  Special case
	semaphores.
	(ipc_cond_init): Drop superfluous strcpy.
	(class ipc_flock): New class to simplify file locking in subsequent
	code.
	(struct mq_hdr): Raise size of mqh_uname to allow adding a unique
	LUID to the name.
	(mq_open): Fix formatting.  Create unique synchronization object names
	using AllocateLocallyUniqueId.
	(struct sem_finfo): New structure defining named semaphore file content.
	(sem_open): Move here.  Rework implementation to allow kernel
	persistent implementation of POSIX named semaphores.
	(_sem_close): Implement sem_close.
	(sem_close): Move here.  Just call _sem_close with do_close parameter
	set to true.
	(sem_unlink): New function.
	* pthread.cc (mangle_sem_name): Remove.
	(sem_open): Move to posix_ipc.cc.
	(sem_close): Ditto.
	* syscalls.cc (close_all_files): Call semaphore::terminate here.
	* thread.cc: Fix formatting.  Rearrange semaphore functions so that
	they are close together.
	(semaphore::semaphore): Rework to play nicely with new named semaphore
	implementation.
	(semaphore::_terminate): Call _sem_close if semaphore is a named
	semaphore.
	(semaphore::destroy): Don't destroy named semaphores.  Return EINVAL
	instead.
	(semaphore::close): Only destroy named semaphores.  Return EINVAL
	otherwise.
	(semaphore::open): Rework to play nicely with new named semaphore
	implementation.  Loop through existing semaphores to be able to
	return same sem_t pointer as a former call on the same named semaphore.
	(semaphore::getinternal): New function called from _sem_close.
	* thread.h (class List): Make mx and head public.
	(class semaphore): Fix formatting.  Align method declarations with
	implementation in thread.cc.  Add members used for named semaphores.
	(semaphore::terminate): New static method.
	* include/semaphore.h: Redefine SEM_FAILED.  Fix formatting.
	(sem_unlink): Add declaration.
	* include/cygwin/version.h: Bump API minor number.
2007-02-20 15:48:04 +00:00
Corinna Vinschen 75833f08cd * thread.h: Revert patch from 2005-09-05.
* thread.cc (pthread_mutex::can_be_unlocked): Return true also if
	mutex is owned by MUTEX_OWNER_ANONYMOUS.
2005-09-06 19:22:54 +00:00
Corinna Vinschen bf58ec35b4 * thread.h (pthread_mutex::get_pthread_self): Remove.
(pthread_mutex::lock): Use ::pthread_self as self parameter.
	(pthread_mutex::trylock): Ditto.
	(pthread_mutex::unlock): Ditto.
	(pthread_mutex::destroy): Ditto.
2005-09-05 15:17:03 +00:00
Corinna Vinschen 7d7e7a21b1 * thread.cc (pthread::create(3 args)): Make bool.
(pthread_null::create): Ditto.
	(pthread::create(4 args)): Check return of inner create rather than
	calling is_good_object().
	* thread.h: Ditto.
2005-08-05 16:14:41 +00:00
Christopher Faylor 2f9ae2ed94 Change foo (void) to foo () for all c++ functions throughout. Remove all
fhandler_*::dump functions throughout.
* fhandler.h (fhandler_dev_mem::close): Remove pass-through function in favor
of virtual method.
(handler_dev_raw::close): Ditto.
(fhandler_dev_clipboard::fixup_after_exec): New method.
* fhandler_dev_mem.cc (fhandler_dev_mem::close): Eliminate pass through
* fhandler_dev_raw.cc (fhandler_dev_raw::close): Ditto.
* fhandler_clipboard.cc (fhandler_dev_clipboard::close): Don't go to extra
effort when execing.
(fhandler_dev_clipboard::fixup_after_exec): New function.
* fhandler_console.cc (fhandler_console::close): Don't do "extra stuff" when we
know we're execing.
* fhandler_disk_file.cc (fhandler_disk_file::close): Ditto.
* fhandler_dsp.cc (fhandler_dev_dsp::close): Ditto.
* fhandler_fifo.cc (fhandler_fifo.cc::close): Ditto.  function in favor of base
function.
* fhandler_random.cc (fhandler_dev_random::close): Ditto.
* fhandler_registry.cc (fhandler_registry::close): Ditto.
* fhandler_tty.cc (fhandler_tty_slave::close): Ditto.
* fhandler_virtual.cc (fhandler_virtual::close): Ditto.
* pinfo.cc (proc_waiter): Remove unneeded hExeced declaration.
* sigproc.cc: Ditto.
* winsup.h (hExeced): Define here.
* fhandler_virtual.cc (fhandler_virtual::fixup_after_exec): Just call close()
to reinitialize things to known state.
2005-07-05 03:16:46 +00:00
Christopher Faylor 4c157aa9e5 * thread.h (verifyable_object_state verifyable_object_isvalid): Delete function
declaration that should have been static.
* thread.cc (verifyable_object_state verifyable_object_isvalid): Make inline
static.
(pthread*::is_good_object): Move to directly after verifyable_object_state
verifyable_object_isvalid and make inline.
2005-07-03 03:25:19 +00:00
Christopher Faylor 893ac8e03c Replace valid memory checks with new myfault class "exception handling", almost
everywhere.  Leave some thread.cc stuff alone for now.
* cygtls.h: Kludge some definitions to avoid including a problematic windows
header.
(_cygtls::_myfault): New entry.
(_cygtls::_myfault_errno): Ditto.
(_cygtls::fault_guarded): New function.
(_cygtls::setup_fault): Ditto.
(_cygtls::return_from_fault): Ditto.
(_cygtls::clear_fault): Ditto.
(myfault): New class.
* exceptions.cc (handle_exceptions): Handle case of guarded fault in system
routine.
* gendef: Add another entry point for setjmp that the compiler doesn't know
about and won't complain about.
* gentls_offsets: Just include windows.h rather than kludging a HANDLE def.
* miscfuncs.cc (check_null_str): Delete.
(check_null_empty_str): Ditto.
(check_null_empty_str_errno): Ditto.
(check_null_str_errno): Ditto.
(__check_null_invalid_struct): Ditto.
(__check_null_invalid_struct_errno): Ditto.
(__check_invalid_read_ptr): Ditto.
(__check_invalid_read_ptr_errno): Ditto.
(dummytest): New function.
(check_iovec_for_read): Delete.
(chec_iovec): Rename from check_iovec_for_write.  Take a read/write parameter.
* tlsoffsets.h: Regenerate.
* winsup.h: Remove check_* declarations.
(check_iovec_for_read): Delete declaration.  Turn into a define instead.
(check_iovec_for_write): Ditto.
(check_iovec): New declaration.
* thread.h: Use ifdef guard name consistent with other header files.
2005-07-03 02:40:30 +00:00
Christopher Faylor 8556456790 * include/pthread.h: Change PTHREAD_MUTEX_DEFAULT to PTHREAD_MUTEX_NORMAL.
Revert PTHREAD_MUTEX_INITIALIZER to PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP
since that is actually closer to what linux does.
* thread.h (cw_cancel_action): New enum.
(cancelable_wait): Use cw_cancel_action as third argument.
* thread.cc (cancelable_wait): Ditto.  Don't wait for cancel if cancel_action
== cw_no_cancel.
(pthread::create): Don't wait for cancel event since that is racy.
(pthread_mutex::pthread_mutex): Set default to PTHREAD_MUTEX_ERRORCHECK.
(pthread_mutexattr::pthread_mutexattr): Ditto.
(pthread_mutex::_lock): Tell cancelable_wait not to wait for cancellation
event.
(semaphore::_timedwait): Accommodate change in cancelable_wait args.
(pthread::join): Ditto.
2005-06-11 04:56:36 +00:00
Christopher Faylor ed364fa9fb Change pthread::cancelable_wait to just cancelable_wait, throughout.
* thread.h (cw_sig_wait): New enum.
(fast_mutex::lock): Use cancelable_wait with resumable signal.
(cancelable_wait): Change fourth argument to cw_sig_wait enum.
* thread.cc (cancelable_wait): Ditto.  Loop on signal detection if fourth
argument == cw_sig_resume.
2005-06-09 05:11:51 +00:00
Christopher Faylor 19adafdc21 * thread.h (List_remove): Revert most of 2005-05-30 change. 2005-06-01 14:55:45 +00:00
Christopher Faylor 9885498829 * thread.h (List_remove): Make node parameter const. Use simple comparison and
assignment rather than InterlockedCompareExchangePointer since access is
already synchronized.
2005-05-30 18:37:41 +00:00
Christopher Faylor 65a7ca7b7b * thread.h (pthread_key::set): Inline.
(pthread_key::get): Ditto.
* thread.cc (pthread::set): Delete.
(pthread::get): Ditto.
2005-05-29 02:42:36 +00:00
Christopher Faylor e3778517d9 * path.cc (chdir): Always use the normalized_path as posix_cwd, except if it
starts with a drive.

Also perform whitespace cleanup.
2004-05-28 19:50:07 +00:00
Christopher Faylor 56a188d1f3 * thread.h (pthread::init_mainthread): Remove parameter forked.
(pthread::set_tls_self_pointer): New static function.
* thread.cc (MTinterface::fixup_after_fork): Change call to
pthread::init_mainthread.
(pthread::init_mainthread): Remove parameter forked.  Simplify thread self
pointer handling.
(pthread::self): Set thread self pointer to null_pthread if thread has not been
initialized.
(pthread::set_tls_self_pointer): New static function.
2004-04-10 00:53:25 +00:00
Christopher Faylor c83bdbf65e * thread.h (pthread::init_mainthread): Add parameter forked. Set forked
default to false..
* thread.cc (MTinterface::fixup_after_fork): Call pthread::init_mainthread with
forked = true.
(pthread::init_mainthread): Add parameter forked.  Do not change thread self
pointer when forked.
2004-03-30 21:27:50 +00:00
Thomas Pfaff b95ae50461 * include/pthread.h (PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP):
New define.
(PTHREAD_NORMAL_MUTEX_INITIALIZER_NP): Ditto.
(PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP): Ditto.
* thread.cc (pthread_mutex::is_good_initializer):
Check for all posssible initializers
(pthread_mutex::is_good_initializer_or_object): Ditto.
(pthread_mutex::is_good_initializer_or_bad_object): Ditto.
(verifyable_object_isvalid): Support up to three static
initializers.
(verifyable_object_isvalid (void const *,long)): Remove.
(pthread_cond::is_good_initializer_or_bad_object): Remove
unneeded objectState var.
(pthread_cond::init): Condition remains unchanged when creation
has failed.
(pthread_rwlock::is_good_initializer_or_bad_object): Remove
unneeded objectState var.
(pthread_rwlock::init): Rwlock remains unchanged when creation
has failed.
(pthread_mutex::init): Remove obsolete comment.
Mutex remains unchanged when creation has failed. Add support
for new initializers.
(pthread_mutex_getprioceiling): Do not create mutex,
just return ENOSYS.
(pthread_mutex_lock): Simplify.
(pthread_mutex_trylock): Remove unneeded local themutex.
(pthread_mutex_unlock): Just return EPERM if mutex is not
initialized.
(pthread_mutex_setprioceiling): Do not create mutex,
just return ENOSYS.
* thread.h (verifyable_object_isvalid): Support up to three
static initializers.
(verifyable_object_isvalid (void const *,long)): Remove
prototype.
(pthread_mutex::init): Add optional initializer to parameter
list.
2004-03-04 21:04:14 +00:00
Corinna Vinschen c9a76075f5 * thread.cc (pthread::cancelable_wait): Rearrange slightly.
Add do_sig_wait parameter.  Wait for signal_arrived if set to true.
	Return WAIT_SIGNALED if signal arrived.
	(pthread_cond::wait): Accomodate change to pthread::cancelable_wait.
	(pthread::join): Ditto.
	(semaphore::_timedwait): Ditto.
	(semaphore::_wait): Ditto.  Change to return int to allow status
	feedback.
	(semaphore::wait): Return return value from semaphore::_wait.
	* thread.h (WAIT_SIGNALED): New definition.
	(pthread::cancelable_wait): Change declaration.  Define do_sig_wait
	as false by default to not interfere with existing calls accidentally.
	(semaphore::_wait): Declare int.
2004-02-24 11:33:15 +00:00