mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-01-15 11:00:04 +08:00
2bd22312df
* uinfo.cc (uinfo_init): Use more robust method for determining if process was invoked from a non-cygwin process. * sync.h (muto::init): Eliminate "inheritance" parameter. (new_muto): Reflect removal of parameter. * sync.cc (muto::init): Ditto. * cygheap.cc (cygheap_init): Ditto. * debug.cc (threadname_init): Ditto. * exceptions.cc (events_init): Ditto. * malloc.cc (malloc_init): Ditto. * path.cc (cwdstuff::init): Ditto. * sigproc.cc (sigproc_init): Ditto. * grp.cc (group_lock): Use different method for locking with static member. (read_etc_group): REALLY ensure that read lock mutex is released. * passwd.cc (passwd_lock): Use different method for locking with static member. (read_etc_passwd): REALLY ensure that read lock mutex is released. * shared.cc (sec_user): Correct reversed inheritance test.
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
/* sync.h: Header file for cygwin synchronization primitives.
|
|
|
|
Copyright 1999, 2000, 2001 Red Hat, Inc.
|
|
|
|
Written by Christopher Faylor <cgf@cygnus.com>
|
|
|
|
This file is part of Cygwin.
|
|
|
|
This software is a copyrighted work licensed under the terms of the
|
|
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
|
|
details. */
|
|
|
|
/* FIXME: Note that currently this class cannot be allocated via `new' since
|
|
there are issues with malloc and fork. */
|
|
class muto
|
|
{
|
|
LONG sync; /* Used to serialize access to this class. */
|
|
LONG visits; /* Count of number of times a thread has called acquire. */
|
|
LONG waiters; /* Number of threads waiting for lock. */
|
|
HANDLE bruteforce; /* event handle used to control waiting for lock. */
|
|
DWORD tid; /* Thread Id of lock owner. */
|
|
public:
|
|
class muto *next;
|
|
const char *name;
|
|
|
|
/* The real constructor. */
|
|
muto *init(const char *name) __attribute__ ((regparm (3)));
|
|
|
|
#if 0 /* FIXME: See comment in sync.cc */
|
|
~muto ()
|
|
#endif
|
|
int acquire (DWORD ms = INFINITE) __attribute__ ((regparm (1))); /* Acquire the lock. */
|
|
int release (); /* Release the lock. */
|
|
|
|
/* Return true if caller thread owns the lock. */
|
|
int ismine () {return tid == GetCurrentThreadId ();}
|
|
DWORD owner () {return tid;}
|
|
int unstable () {return !tid && (sync || waiters >= 0);}
|
|
void reset ();
|
|
};
|
|
|
|
extern muto muto_start;
|
|
|
|
/* Use a statically allocated buffer as the storage for a muto */
|
|
#define new_muto(__name) \
|
|
({ \
|
|
static muto __mbuf __attribute__((nocommon)) __attribute__((section(".data_cygwin_nocopy"))); \
|
|
__mbuf.init (__name); \
|
|
})
|