Turn pthread_spinlock_t into a self-contained object. On uni-processor
configurations, interrupts are disabled in the lock/trylock operations
and the previous interrupt status is restored in the corresponding
unlock operations. On SMP configurations, a ticket lock is a acquired
and released in addition.
See also:
https://devel.rtems.org/ticket/2674
This implementation is simple and efficient. However, this test case of
the Linux Test Project would fail due to call of printf() and sleep()
during spin lock ownership:
https://github.com/linux-test-project/ltp/blob/master/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/1-2.c
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
This makes it possible provide operating system specific types for
<pthread.h>. It is in line with the FreeBSD header file structure and
allows a future cleanup of <pthread.h> to not expose unrelated things
via <sys/types.h> and <unistd.h>. Glibc uses the similar
<bits/pthreadtypes.h> for this purpose.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Add _TICKET_LOCK_INITIALIZER to statically initialize a
_Ticket_lock_Control structure. This makes it possible to embed a
ticket lock in other structures outside of <sys/lock.h>.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
The FreeBSD kernel types are not used in Newlib. Provide them via an
external header file to decouple Newlib and FreeBSD updates for RTEMS.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
This file was copied verbatim from FreeBSD and is in sync
with the FreeBSD svn version used by rtems-libbsd.
Signed-off-by: Joel Sherrill <joelemail@rtems.org>
Add _Thread_queue_Queue::_owner which will be used for the upcomming
priority inheritance implementation and an O(m) independence-preserving
protocol (OMIP) implementation.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Move _Thread_queue_Queue::_Lock to begin of the structure. On RTEMS,
the presence of a lock component in the thread queue structures actually
depends on the build-time RTEMS_SMP configuration option. A move of
this part to the begin of the structure allows an implementation re-use
for the other parts.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Provide the following types via <sys/types.h> on RTEMS for FreeBSD
compatibility if __BSD_VISIBLE
* accmode_t,
* cap_rights_t,
* c_caddr_t,
* cpulevel_t,
* fixpt_t,
* lwpid_t,
* uintfptr_t,
* vm_offset_t,
* vm_ooffset_t,
* vm_paddr_t,
* vm_pindex_t, and
* vm_size_t.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Newlib defines defaults for internal types via <sys/_types.h> and uses
<machine/_types.h> to let targets define their own type if necessary.
Previously for example
#ifndef __dev_t_defined
typedef short __dev_t;
#endif
However, the __*_t_defined pattern conflicts with the glibc type guard
pattern for user types, e.g. dev_t in this example. Introduce a
__machine_*_t_defined pattern for internal types (defined by
<machine/_types.h>, used by <sys/_types.h>). For example
#ifndef __machine_dev_t_defined
typedef short __dev_t;
#endif
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
This change solves a glibc/BSD compatibility problem.
glibc and BSD use double underscore types for internal types. The Linux
port of Newlib uses some glibc provided internal type definitions which
are not protected by guard defines, e.g. __off_t. To avoid a conflict
Newlib uses single underscore types for some internal types, e.g.
_off_t. However, for BSD compatibility we have to define the internal
types with double underscore names in <sys/_types.h>.
The header file <machine/types.h> is Newlib-specific. It was used
instead of <sys/_types.h> to provide the internal type definitions
_CLOCK_T, _TIME_T_, _CLOCKID_T_, _TIMER_T_, and __suseconds_t. Move
these definitions to <sys/_types.h> (there exist two instances of this
file, one for Linux and one for all other targets). This makes the
_HAVE_SYSTYPES configuration define obsolete (could possibly break the
__RDOS__ target). Use the standard <sys/_types.h> include throughout.
Move __loff_t defintion to default (non-Linux) <sys/_types.h>. Define
it via _off64_t to avoid a dependency on the compiler.
Provide the __off_t definition via default (non-Linux) <sys/_types.h>
based on _off_t for all systems except Cygwin. For Cygwin use _off64_t.
Define off_t via __off_t.
Provide the __pid_t definition via default (non-Linux) <sys/_types.h>.
This prevents a potential __pid_t and pid_t incompatibility. Add BSD
guard defines for pid_t.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Move the kernel dependent parts of <sys/time.h> to new system-specific
header file <machine/_time.h>. Provide an empty default implementation.
Add a specialized implementation for RTEMS.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
This include is not present in default Newlib, glibc and FreeBSD
<sys/param.h>. With it there is now a conflict with <sys/libkern.h>
introduced by ecf453f963.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
According to the OpenBSD man page, "A Replacement Call for Random". It
offers high quality random numbers derived from input data obtained by
the OpenBSD specific getentropy() system call which is declared in
<unistd.h> and must be implemented for each Newlib port externally. The
arc4random() functions are used for example in LibreSSL and OpenSSH.
Cygwin provides currently its own implementation of the arc4random
family. Maybe it makes sense to use this getentropy() implementation:
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libcrypto/crypto/getentropy_win.c?rev=1.4&content-type=text/x-cvsweb-markup
* libc/include/stdlib.h (arc4random): Declare if __BSD_VISIBLE.
(arc4random_buf): Likewise.
(arc4random_uniform): Likewise.
* libc/include/sys/unistd.h (getentropy): Likewise.
* libc/include/machine/_arc4random.h: New file.
* libc/stdlib/arc4random.c: Likewise.
* libc/stdlib/arc4random.h: Likewise.
* libc/stdlib/arc4random_uniform.c: Likewise.
* libc/stdlib/chacha_private.h: Likewise.
* libc/sys/rtems/include/machine/_arc4random.h: Likewise.
* libc/stdlib/Makefile.am (EXTENDED_SOURCES): Add arc4random.c
and arc4random_uniform.c.
* libc/stdlib/Makefile.in: Regenerate.
- Move types and defines to
<machine/_threads.h> so that it can be customized per target.
* libc/include/threads.h: New.
* libc/sys/rtems/include/machine/_threads.h: Likewise.
Sorry, there was a typo in <sys/lock.h> which leads to memory corruption
since not enough space is reserved for the lock object.
newlib/ChangeLog
2015-07-30 Sebastian Huber <sebastian.huber@embedded-brains.de>
* libc/sys/rtems/include/sys/lock.h (__LOCK_INIT_RECURSIVE): Use
proper type.
During libgcc build the first include search path for <...> is
"../newlib/libc/sys/rtems/include". Move all RTEMS specific header
files to "libc/sys/rtems/include" so that they can be found. Later
during libc build the header files in the previous location were somehow
present, but for libgcc build they were invisible. This change is
necessary to use <pthread.h> for the GCC thread model implementation.
newlib/ChangeLog
2015-07-27 Sebastian Huber <sebastian.huber@embedded-brains.de>
libc/sys/rtems/machine/_types.h: Move to ...
libc/sys/rtems/include/machine/_types.h: ... here.
libc/sys/rtems/machine/limits.h: Move to ...
libc/sys/rtems/include/machine/limits.h: ... here.
libc/sys/rtems/machine/param.h: Move to ...
libc/sys/rtems/include/machine/param.h: ... here.
libc/sys/rtems/sys/cpuset.h: Move to ...
libc/sys/rtems/include/sys/cpuset.h: ... here.
libc/sys/rtems/sys/dirent.h: Move to ...
libc/sys/rtems/include/sys/dirent.h: ... here.
libc/sys/rtems/sys/param.h: Move to ...
libc/sys/rtems/include/sys/param.h: ... here.
libc/sys/rtems/sys/syslimits.h: Move to ...
libc/sys/rtems/include/sys/syslimits.h: ... here.
libc/sys/rtems/sys/utime.h: Move to ...
libc/sys/rtems/include/sys/utime.h: ... here.
* libc/sys/rtems/include/limits.h, libc/sys/rtems/sys/param.h,
libc/sys/rtems/sys/syslimits.h: Update to be in sync with what
constants are defined in each file in the shared versions in
libc/include.
* libc/sys/rtems/crt0.c: Define extra symbols on SH and HP-PA to
autoconf can link programs.
* libc/include/machine/types.h: Explicitly specify signed on
intXX_t types to ensure they are signed.
* Merge RTEMS specific .h files into main libc/include.
* libc/sys/rtems/include/signal.h: Removed.
* libc/sys/rtems/include/time.h: Removed.
* libc/sys/rtems/sys/features.h: Removed.
* libc/sys/rtems/sys/sched.h: Removed.
* libc/sys/rtems/sys/siginfo.h: Removed.
* libc/sys/rtems/sys/signal.h: Removed.
* libc/sys/rtems/sys/time.h: Removed.
* libc/sys/rtems/sys/times.h: Removed.
definitions for time_t and clock_t since these are
no longer in time.h.
* libc/include/pthread.h: New file.
* libc/include/sys/sched.h: New file.
* libc/include/sys/features.h: New file.
* libc/include/time.h: Removed duplicate definition of clock_t
and time_t, get them from <sys/types.h> instead. Add prototypes for POSIX clock and timer functionality.
* libc/sys/linux/sys/types.h: Changed to include
* libc/include/machine/types.h: Add _CLOCKID_T_ and _TIMER_T_.
* libc/include/sys/signal.h: Add more complete set of POSIX
signal functionality including real-time and threaded signals.
* libc/include/sys/types.h: Add clock_t, time_t, struct
timespec, and struct itimerspec. Centralizing these makes
things cleaner. RTEMS uses 64-bit dev_t.
Added numerous primitive definitions
for pthreads including macros, pthread_attr_t,
pthread_mutexattr_t, pthread_condattr_t, pthread_key_t,
pthread_once_t, and pthread_t.
* libc/include/sys/unistd.h: Added getlogin_r() prototype.
If RTEMS follow POSIX on read(), write() and sbrk() prototype.
Feature flags removed and moved to new file <sys/features.h>.
Full set of POSIX sysconf() constants
Sebastian Huber
Gedare Bloom
Jeff Johnston
Nick Withers
Corinna Vinschen
Joel Sherrill
Ralf Corsepius
Christopher Faylor