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Diffstat (limited to 'contrib/gcc/config/i386/gthr-win32.c')
-rw-r--r--contrib/gcc/config/i386/gthr-win32.c254
1 files changed, 0 insertions, 254 deletions
diff --git a/contrib/gcc/config/i386/gthr-win32.c b/contrib/gcc/config/i386/gthr-win32.c
deleted file mode 100644
index d13b5398c69e..000000000000
--- a/contrib/gcc/config/i386/gthr-win32.c
+++ /dev/null
@@ -1,254 +0,0 @@
-/* Implementation of W32-specific threads compatibility routines for
- libgcc2. */
-
-/* Copyright (C) 1999, 2000, 2002, 2004 Free Software Foundation, Inc.
- Contributed by Mumit Khan <khan@xraylith.wisc.edu>.
- Modified and moved to separate file by Danny Smith
- <dannysmith@users.sourceforge.net>.
-
-This file is part of GCC.
-
-GCC is free software; you can redistribute it and/or modify it under
-the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
-version.
-
-GCC is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-for more details.
-
-You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
-
-/* As a special exception, if you link this library with other files,
- some of which are compiled with GCC, to produce an executable,
- this library does not by itself cause the resulting executable
- to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License. */
-
-
-#include <windows.h>
-#ifndef __GTHREAD_HIDE_WIN32API
-# define __GTHREAD_HIDE_WIN32API 1
-#endif
-#undef __GTHREAD_I486_INLINE_LOCK_PRIMITIVES
-#define __GTHREAD_I486_INLINE_LOCK_PRIMITIVES
-#include <gthr-win32.h>
-
-/* Windows32 threads specific definitions. The windows32 threading model
- does not map well into pthread-inspired gcc's threading model, and so
- there are caveats one needs to be aware of.
-
- 1. The destructor supplied to __gthread_key_create is ignored for
- generic x86-win32 ports. This will certainly cause memory leaks
- due to unreclaimed eh contexts (sizeof (eh_context) is at least
- 24 bytes for x86 currently).
-
- This memory leak may be significant for long-running applications
- that make heavy use of C++ EH.
-
- However, Mingw runtime (version 0.3 or newer) provides a mechanism
- to emulate pthreads key dtors; the runtime provides a special DLL,
- linked in if -mthreads option is specified, that runs the dtors in
- the reverse order of registration when each thread exits. If
- -mthreads option is not given, a stub is linked in instead of the
- DLL, which results in memory leak. Other x86-win32 ports can use
- the same technique of course to avoid the leak.
-
- 2. The error codes returned are non-POSIX like, and cast into ints.
- This may cause incorrect error return due to truncation values on
- hw where sizeof (DWORD) > sizeof (int).
-
- 3. We are currently using a special mutex instead of the Critical
- Sections, since Win9x does not support TryEnterCriticalSection
- (while NT does).
-
- The basic framework should work well enough. In the long term, GCC
- needs to use Structured Exception Handling on Windows32. */
-
-int
-__gthr_win32_once (__gthread_once_t *once, void (*func) (void))
-{
- if (once == NULL || func == NULL)
- return EINVAL;
-
- if (! once->done)
- {
- if (InterlockedIncrement (&(once->started)) == 0)
- {
- (*func) ();
- once->done = TRUE;
- }
- else
- {
- /* Another thread is currently executing the code, so wait for it
- to finish; yield the CPU in the meantime. If performance
- does become an issue, the solution is to use an Event that
- we wait on here (and set above), but that implies a place to
- create the event before this routine is called. */
- while (! once->done)
- Sleep (0);
- }
- }
- return 0;
-}
-
-/* Windows32 thread local keys don't support destructors; this leads to
- leaks, especially in threaded applications making extensive use of
- C++ EH. Mingw uses a thread-support DLL to work-around this problem. */
-
-int
-__gthr_win32_key_create (__gthread_key_t *key, void (*dtor) (void *))
-{
- int status = 0;
- DWORD tls_index = TlsAlloc ();
- if (tls_index != 0xFFFFFFFF)
- {
- *key = tls_index;
-#ifdef MINGW32_SUPPORTS_MT_EH
- /* Mingw runtime will run the dtors in reverse order for each thread
- when the thread exits. */
- status = __mingwthr_key_dtor (*key, dtor);
-#endif
- }
- else
- status = (int) GetLastError ();
- return status;
-}
-
-int
-__gthr_win32_key_delete (__gthread_key_t key)
-{
- return (TlsFree (key) != 0) ? 0 : (int) GetLastError ();
-}
-
-void *
-__gthr_win32_getspecific (__gthread_key_t key)
-{
- DWORD lasterror;
- void *ptr;
- lasterror = GetLastError();
- ptr = TlsGetValue(key);
- SetLastError( lasterror );
- return ptr;
-}
-
-int
-__gthr_win32_setspecific (__gthread_key_t key, const void *ptr)
-{
- return (TlsSetValue (key, (void*) ptr) != 0) ? 0 : (int) GetLastError ();
-}
-
-void
-__gthr_win32_mutex_init_function (__gthread_mutex_t *mutex)
-{
- mutex->counter = -1;
- mutex->sema = CreateSemaphore (NULL, 0, 65535, NULL);
-}
-
-int
-__gthr_win32_mutex_lock (__gthread_mutex_t *mutex)
-{
- if (InterlockedIncrement (&mutex->counter) == 0 ||
- WaitForSingleObject (mutex->sema, INFINITE) == WAIT_OBJECT_0)
- return 0;
- else
- {
- /* WaitForSingleObject returns WAIT_FAILED, and we can only do
- some best-effort cleanup here. */
- InterlockedDecrement (&mutex->counter);
- return 1;
- }
-}
-
-int
-__gthr_win32_mutex_trylock (__gthread_mutex_t *mutex)
-{
- if (__GTHR_W32_InterlockedCompareExchange (&mutex->counter, 0, -1) < 0)
- return 0;
- else
- return 1;
-}
-
-int
-__gthr_win32_mutex_unlock (__gthread_mutex_t *mutex)
-{
- if (InterlockedDecrement (&mutex->counter) >= 0)
- return ReleaseSemaphore (mutex->sema, 1, NULL) ? 0 : 1;
- else
- return 0;
-}
-
-void
-__gthr_win32_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
-{
- mutex->counter = -1;
- mutex->depth = 0;
- mutex->owner = 0;
- mutex->sema = CreateSemaphore (NULL, 0, 65535, NULL);
-}
-
-int
-__gthr_win32_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
-{
- DWORD me = GetCurrentThreadId();
- if (InterlockedIncrement (&mutex->counter) == 0)
- {
- mutex->depth = 1;
- mutex->owner = me;
- }
- else if (mutex->owner == me)
- {
- InterlockedDecrement (&mutex->counter);
- ++(mutex->depth);
- }
- else if (WaitForSingleObject (mutex->sema, INFINITE) == WAIT_OBJECT_0)
- {
- mutex->depth = 1;
- mutex->owner = me;
- }
- else
- {
- /* WaitForSingleObject returns WAIT_FAILED, and we can only do
- some best-effort cleanup here. */
- InterlockedDecrement (&mutex->counter);
- return 1;
- }
- return 0;
-}
-
-int
-__gthr_win32_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
-{
- DWORD me = GetCurrentThreadId();
- if (__GTHR_W32_InterlockedCompareExchange (&mutex->counter, 0, -1) < 0)
- {
- mutex->depth = 1;
- mutex->owner = me;
- }
- else if (mutex->owner == me)
- ++(mutex->depth);
- else
- return 1;
-
- return 0;
-}
-
-int
-__gthr_win32_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
-{
- --(mutex->depth);
- if (mutex->depth == 0)
- {
- mutex->owner = 0;
-
- if (InterlockedDecrement (&mutex->counter) >= 0)
- return ReleaseSemaphore (mutex->sema, 1, NULL) ? 0 : 1;
- }
-
- return 0;
-}
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