/* Threads compatibility routines for libgcc2 and libobjc. */
|
/* Threads compatibility routines for libgcc2 and libobjc. */
|
/* Compile this one with gcc. */
|
/* Compile this one with gcc. */
|
|
|
/* Copyright (C) 1999, 2000, 2002, 2003, 2004, 2005
|
/* Copyright (C) 1999, 2000, 2002, 2003, 2004, 2005
|
Free Software Foundation, Inc.
|
Free Software Foundation, Inc.
|
Contributed by Mumit Khan <khan@xraylith.wisc.edu>.
|
Contributed by Mumit Khan <khan@xraylith.wisc.edu>.
|
|
|
This file is part of GCC.
|
This file is part of GCC.
|
|
|
GCC is free software; you can redistribute it and/or modify it under
|
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
|
the terms of the GNU General Public License as published by the Free
|
Software Foundation; either version 2, or (at your option) any later
|
Software Foundation; either version 2, or (at your option) any later
|
version.
|
version.
|
|
|
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
for more details.
|
for more details.
|
|
|
You should have received a copy of the GNU General Public License
|
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
|
along with GCC; see the file COPYING. If not, write to the Free
|
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
|
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
|
02110-1301, USA. */
|
02110-1301, USA. */
|
|
|
/* As a special exception, if you link this library with other files,
|
/* As a special exception, if you link this library with other files,
|
some of which are compiled with GCC, to produce an executable,
|
some of which are compiled with GCC, to produce an executable,
|
this library does not by itself cause the resulting executable
|
this library does not by itself cause the resulting executable
|
to be covered by the GNU General Public License.
|
to be covered by the GNU General Public License.
|
This exception does not however invalidate any other reasons why
|
This exception does not however invalidate any other reasons why
|
the executable file might be covered by the GNU General Public License. */
|
the executable file might be covered by the GNU General Public License. */
|
|
|
#ifndef GCC_GTHR_WIN32_H
|
#ifndef GCC_GTHR_WIN32_H
|
#define GCC_GTHR_WIN32_H
|
#define GCC_GTHR_WIN32_H
|
|
|
/* Windows32 threads specific definitions. The windows32 threading model
|
/* Windows32 threads specific definitions. The windows32 threading model
|
does not map well into pthread-inspired gcc's threading model, and so
|
does not map well into pthread-inspired gcc's threading model, and so
|
there are caveats one needs to be aware of.
|
there are caveats one needs to be aware of.
|
|
|
1. The destructor supplied to __gthread_key_create is ignored for
|
1. The destructor supplied to __gthread_key_create is ignored for
|
generic x86-win32 ports. This will certainly cause memory leaks
|
generic x86-win32 ports. This will certainly cause memory leaks
|
due to unreclaimed eh contexts (sizeof (eh_context) is at least
|
due to unreclaimed eh contexts (sizeof (eh_context) is at least
|
24 bytes for x86 currently).
|
24 bytes for x86 currently).
|
|
|
This memory leak may be significant for long-running applications
|
This memory leak may be significant for long-running applications
|
that make heavy use of C++ EH.
|
that make heavy use of C++ EH.
|
|
|
However, Mingw runtime (version 0.3 or newer) provides a mechanism
|
However, Mingw runtime (version 0.3 or newer) provides a mechanism
|
to emulate pthreads key dtors; the runtime provides a special DLL,
|
to emulate pthreads key dtors; the runtime provides a special DLL,
|
linked in if -mthreads option is specified, that runs the dtors in
|
linked in if -mthreads option is specified, that runs the dtors in
|
the reverse order of registration when each thread exits. If
|
the reverse order of registration when each thread exits. If
|
-mthreads option is not given, a stub is linked in instead of the
|
-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
|
DLL, which results in memory leak. Other x86-win32 ports can use
|
the same technique of course to avoid the leak.
|
the same technique of course to avoid the leak.
|
|
|
2. The error codes returned are non-POSIX like, and cast into ints.
|
2. The error codes returned are non-POSIX like, and cast into ints.
|
This may cause incorrect error return due to truncation values on
|
This may cause incorrect error return due to truncation values on
|
hw where sizeof (DWORD) > sizeof (int).
|
hw where sizeof (DWORD) > sizeof (int).
|
|
|
3. We are currently using a special mutex instead of the Critical
|
3. We are currently using a special mutex instead of the Critical
|
Sections, since Win9x does not support TryEnterCriticalSection
|
Sections, since Win9x does not support TryEnterCriticalSection
|
(while NT does).
|
(while NT does).
|
|
|
The basic framework should work well enough. In the long term, GCC
|
The basic framework should work well enough. In the long term, GCC
|
needs to use Structured Exception Handling on Windows32. */
|
needs to use Structured Exception Handling on Windows32. */
|
|
|
#define __GTHREADS 1
|
#define __GTHREADS 1
|
|
|
#include <errno.h>
|
#include <errno.h>
|
#ifdef __MINGW32__
|
#ifdef __MINGW32__
|
#include <_mingw.h>
|
#include <_mingw.h>
|
#endif
|
#endif
|
|
|
#ifdef _LIBOBJC
|
#ifdef _LIBOBJC
|
|
|
/* This is necessary to prevent windef.h (included from windows.h) from
|
/* This is necessary to prevent windef.h (included from windows.h) from
|
defining its own BOOL as a typedef. */
|
defining its own BOOL as a typedef. */
|
#ifndef __OBJC__
|
#ifndef __OBJC__
|
#define __OBJC__
|
#define __OBJC__
|
#endif
|
#endif
|
#include <windows.h>
|
#include <windows.h>
|
/* Now undef the windows BOOL. */
|
/* Now undef the windows BOOL. */
|
#undef BOOL
|
#undef BOOL
|
|
|
/* Key structure for maintaining thread specific storage */
|
/* Key structure for maintaining thread specific storage */
|
static DWORD __gthread_objc_data_tls = (DWORD) -1;
|
static DWORD __gthread_objc_data_tls = (DWORD) -1;
|
|
|
/* Backend initialization functions */
|
/* Backend initialization functions */
|
|
|
/* Initialize the threads subsystem. */
|
/* Initialize the threads subsystem. */
|
int
|
int
|
__gthread_objc_init_thread_system (void)
|
__gthread_objc_init_thread_system (void)
|
{
|
{
|
/* Initialize the thread storage key. */
|
/* Initialize the thread storage key. */
|
if ((__gthread_objc_data_tls = TlsAlloc ()) != (DWORD) -1)
|
if ((__gthread_objc_data_tls = TlsAlloc ()) != (DWORD) -1)
|
return 0;
|
return 0;
|
else
|
else
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/* Close the threads subsystem. */
|
/* Close the threads subsystem. */
|
int
|
int
|
__gthread_objc_close_thread_system (void)
|
__gthread_objc_close_thread_system (void)
|
{
|
{
|
if (__gthread_objc_data_tls != (DWORD) -1)
|
if (__gthread_objc_data_tls != (DWORD) -1)
|
TlsFree (__gthread_objc_data_tls);
|
TlsFree (__gthread_objc_data_tls);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Backend thread functions */
|
/* Backend thread functions */
|
|
|
/* Create a new thread of execution. */
|
/* Create a new thread of execution. */
|
objc_thread_t
|
objc_thread_t
|
__gthread_objc_thread_detach (void (*func)(void *arg), void *arg)
|
__gthread_objc_thread_detach (void (*func)(void *arg), void *arg)
|
{
|
{
|
DWORD thread_id = 0;
|
DWORD thread_id = 0;
|
HANDLE win32_handle;
|
HANDLE win32_handle;
|
|
|
if (!(win32_handle = CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE) func,
|
if (!(win32_handle = CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE) func,
|
arg, 0, &thread_id)))
|
arg, 0, &thread_id)))
|
thread_id = 0;
|
thread_id = 0;
|
|
|
return (objc_thread_t) thread_id;
|
return (objc_thread_t) thread_id;
|
}
|
}
|
|
|
/* Set the current thread's priority. */
|
/* Set the current thread's priority. */
|
int
|
int
|
__gthread_objc_thread_set_priority (int priority)
|
__gthread_objc_thread_set_priority (int priority)
|
{
|
{
|
int sys_priority = 0;
|
int sys_priority = 0;
|
|
|
switch (priority)
|
switch (priority)
|
{
|
{
|
case OBJC_THREAD_INTERACTIVE_PRIORITY:
|
case OBJC_THREAD_INTERACTIVE_PRIORITY:
|
sys_priority = THREAD_PRIORITY_NORMAL;
|
sys_priority = THREAD_PRIORITY_NORMAL;
|
break;
|
break;
|
default:
|
default:
|
case OBJC_THREAD_BACKGROUND_PRIORITY:
|
case OBJC_THREAD_BACKGROUND_PRIORITY:
|
sys_priority = THREAD_PRIORITY_BELOW_NORMAL;
|
sys_priority = THREAD_PRIORITY_BELOW_NORMAL;
|
break;
|
break;
|
case OBJC_THREAD_LOW_PRIORITY:
|
case OBJC_THREAD_LOW_PRIORITY:
|
sys_priority = THREAD_PRIORITY_LOWEST;
|
sys_priority = THREAD_PRIORITY_LOWEST;
|
break;
|
break;
|
}
|
}
|
|
|
/* Change priority */
|
/* Change priority */
|
if (SetThreadPriority (GetCurrentThread (), sys_priority))
|
if (SetThreadPriority (GetCurrentThread (), sys_priority))
|
return 0;
|
return 0;
|
else
|
else
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/* Return the current thread's priority. */
|
/* Return the current thread's priority. */
|
int
|
int
|
__gthread_objc_thread_get_priority (void)
|
__gthread_objc_thread_get_priority (void)
|
{
|
{
|
int sys_priority;
|
int sys_priority;
|
|
|
sys_priority = GetThreadPriority (GetCurrentThread ());
|
sys_priority = GetThreadPriority (GetCurrentThread ());
|
|
|
switch (sys_priority)
|
switch (sys_priority)
|
{
|
{
|
case THREAD_PRIORITY_HIGHEST:
|
case THREAD_PRIORITY_HIGHEST:
|
case THREAD_PRIORITY_TIME_CRITICAL:
|
case THREAD_PRIORITY_TIME_CRITICAL:
|
case THREAD_PRIORITY_ABOVE_NORMAL:
|
case THREAD_PRIORITY_ABOVE_NORMAL:
|
case THREAD_PRIORITY_NORMAL:
|
case THREAD_PRIORITY_NORMAL:
|
return OBJC_THREAD_INTERACTIVE_PRIORITY;
|
return OBJC_THREAD_INTERACTIVE_PRIORITY;
|
|
|
default:
|
default:
|
case THREAD_PRIORITY_BELOW_NORMAL:
|
case THREAD_PRIORITY_BELOW_NORMAL:
|
return OBJC_THREAD_BACKGROUND_PRIORITY;
|
return OBJC_THREAD_BACKGROUND_PRIORITY;
|
|
|
case THREAD_PRIORITY_IDLE:
|
case THREAD_PRIORITY_IDLE:
|
case THREAD_PRIORITY_LOWEST:
|
case THREAD_PRIORITY_LOWEST:
|
return OBJC_THREAD_LOW_PRIORITY;
|
return OBJC_THREAD_LOW_PRIORITY;
|
}
|
}
|
|
|
/* Couldn't get priority. */
|
/* Couldn't get priority. */
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/* Yield our process time to another thread. */
|
/* Yield our process time to another thread. */
|
void
|
void
|
__gthread_objc_thread_yield (void)
|
__gthread_objc_thread_yield (void)
|
{
|
{
|
Sleep (0);
|
Sleep (0);
|
}
|
}
|
|
|
/* Terminate the current thread. */
|
/* Terminate the current thread. */
|
int
|
int
|
__gthread_objc_thread_exit (void)
|
__gthread_objc_thread_exit (void)
|
{
|
{
|
/* exit the thread */
|
/* exit the thread */
|
ExitThread (__objc_thread_exit_status);
|
ExitThread (__objc_thread_exit_status);
|
|
|
/* Failed if we reached here */
|
/* Failed if we reached here */
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/* Returns an integer value which uniquely describes a thread. */
|
/* Returns an integer value which uniquely describes a thread. */
|
objc_thread_t
|
objc_thread_t
|
__gthread_objc_thread_id (void)
|
__gthread_objc_thread_id (void)
|
{
|
{
|
return (objc_thread_t) GetCurrentThreadId ();
|
return (objc_thread_t) GetCurrentThreadId ();
|
}
|
}
|
|
|
/* Sets the thread's local storage pointer. */
|
/* Sets the thread's local storage pointer. */
|
int
|
int
|
__gthread_objc_thread_set_data (void *value)
|
__gthread_objc_thread_set_data (void *value)
|
{
|
{
|
if (TlsSetValue (__gthread_objc_data_tls, value))
|
if (TlsSetValue (__gthread_objc_data_tls, value))
|
return 0;
|
return 0;
|
else
|
else
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/* Returns the thread's local storage pointer. */
|
/* Returns the thread's local storage pointer. */
|
void *
|
void *
|
__gthread_objc_thread_get_data (void)
|
__gthread_objc_thread_get_data (void)
|
{
|
{
|
DWORD lasterror;
|
DWORD lasterror;
|
void *ptr;
|
void *ptr;
|
|
|
lasterror = GetLastError ();
|
lasterror = GetLastError ();
|
|
|
ptr = TlsGetValue (__gthread_objc_data_tls); /* Return thread data. */
|
ptr = TlsGetValue (__gthread_objc_data_tls); /* Return thread data. */
|
|
|
SetLastError (lasterror);
|
SetLastError (lasterror);
|
|
|
return ptr;
|
return ptr;
|
}
|
}
|
|
|
/* Backend mutex functions */
|
/* Backend mutex functions */
|
|
|
/* Allocate a mutex. */
|
/* Allocate a mutex. */
|
int
|
int
|
__gthread_objc_mutex_allocate (objc_mutex_t mutex)
|
__gthread_objc_mutex_allocate (objc_mutex_t mutex)
|
{
|
{
|
if ((mutex->backend = (void *) CreateMutex (NULL, 0, NULL)) == NULL)
|
if ((mutex->backend = (void *) CreateMutex (NULL, 0, NULL)) == NULL)
|
return -1;
|
return -1;
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Deallocate a mutex. */
|
/* Deallocate a mutex. */
|
int
|
int
|
__gthread_objc_mutex_deallocate (objc_mutex_t mutex)
|
__gthread_objc_mutex_deallocate (objc_mutex_t mutex)
|
{
|
{
|
CloseHandle ((HANDLE) (mutex->backend));
|
CloseHandle ((HANDLE) (mutex->backend));
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Grab a lock on a mutex. */
|
/* Grab a lock on a mutex. */
|
int
|
int
|
__gthread_objc_mutex_lock (objc_mutex_t mutex)
|
__gthread_objc_mutex_lock (objc_mutex_t mutex)
|
{
|
{
|
int status;
|
int status;
|
|
|
status = WaitForSingleObject ((HANDLE) (mutex->backend), INFINITE);
|
status = WaitForSingleObject ((HANDLE) (mutex->backend), INFINITE);
|
if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED)
|
if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED)
|
return -1;
|
return -1;
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Try to grab a lock on a mutex. */
|
/* Try to grab a lock on a mutex. */
|
int
|
int
|
__gthread_objc_mutex_trylock (objc_mutex_t mutex)
|
__gthread_objc_mutex_trylock (objc_mutex_t mutex)
|
{
|
{
|
int status;
|
int status;
|
|
|
status = WaitForSingleObject ((HANDLE) (mutex->backend), 0);
|
status = WaitForSingleObject ((HANDLE) (mutex->backend), 0);
|
if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED)
|
if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED)
|
return -1;
|
return -1;
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Unlock the mutex */
|
/* Unlock the mutex */
|
int
|
int
|
__gthread_objc_mutex_unlock (objc_mutex_t mutex)
|
__gthread_objc_mutex_unlock (objc_mutex_t mutex)
|
{
|
{
|
if (ReleaseMutex ((HANDLE) (mutex->backend)) == 0)
|
if (ReleaseMutex ((HANDLE) (mutex->backend)) == 0)
|
return -1;
|
return -1;
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Backend condition mutex functions */
|
/* Backend condition mutex functions */
|
|
|
/* Allocate a condition. */
|
/* Allocate a condition. */
|
int
|
int
|
__gthread_objc_condition_allocate (objc_condition_t condition)
|
__gthread_objc_condition_allocate (objc_condition_t condition)
|
{
|
{
|
/* Unimplemented. */
|
/* Unimplemented. */
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/* Deallocate a condition. */
|
/* Deallocate a condition. */
|
int
|
int
|
__gthread_objc_condition_deallocate (objc_condition_t condition)
|
__gthread_objc_condition_deallocate (objc_condition_t condition)
|
{
|
{
|
/* Unimplemented. */
|
/* Unimplemented. */
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/* Wait on the condition */
|
/* Wait on the condition */
|
int
|
int
|
__gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
|
__gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
|
{
|
{
|
/* Unimplemented. */
|
/* Unimplemented. */
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/* Wake up all threads waiting on this condition. */
|
/* Wake up all threads waiting on this condition. */
|
int
|
int
|
__gthread_objc_condition_broadcast (objc_condition_t condition)
|
__gthread_objc_condition_broadcast (objc_condition_t condition)
|
{
|
{
|
/* Unimplemented. */
|
/* Unimplemented. */
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/* Wake up one thread waiting on this condition. */
|
/* Wake up one thread waiting on this condition. */
|
int
|
int
|
__gthread_objc_condition_signal (objc_condition_t condition)
|
__gthread_objc_condition_signal (objc_condition_t condition)
|
{
|
{
|
/* Unimplemented. */
|
/* Unimplemented. */
|
return -1;
|
return -1;
|
}
|
}
|
|
|
#else /* _LIBOBJC */
|
#else /* _LIBOBJC */
|
|
|
#ifdef __cplusplus
|
#ifdef __cplusplus
|
extern "C" {
|
extern "C" {
|
#endif
|
#endif
|
|
|
typedef unsigned long __gthread_key_t;
|
typedef unsigned long __gthread_key_t;
|
|
|
typedef struct {
|
typedef struct {
|
int done;
|
int done;
|
long started;
|
long started;
|
} __gthread_once_t;
|
} __gthread_once_t;
|
|
|
typedef struct {
|
typedef struct {
|
long counter;
|
long counter;
|
void *sema;
|
void *sema;
|
} __gthread_mutex_t;
|
} __gthread_mutex_t;
|
|
|
typedef struct {
|
typedef struct {
|
long counter;
|
long counter;
|
long depth;
|
long depth;
|
unsigned long owner;
|
unsigned long owner;
|
void *sema;
|
void *sema;
|
} __gthread_recursive_mutex_t;
|
} __gthread_recursive_mutex_t;
|
|
|
#define __GTHREAD_ONCE_INIT {0, -1}
|
#define __GTHREAD_ONCE_INIT {0, -1}
|
#define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function
|
#define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function
|
#define __GTHREAD_MUTEX_INIT_DEFAULT {-1, 0}
|
#define __GTHREAD_MUTEX_INIT_DEFAULT {-1, 0}
|
#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION \
|
#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION \
|
__gthread_recursive_mutex_init_function
|
__gthread_recursive_mutex_init_function
|
#define __GTHREAD_RECURSIVE_MUTEX_INIT_DEFAULT {-1, 0, 0, 0}
|
#define __GTHREAD_RECURSIVE_MUTEX_INIT_DEFAULT {-1, 0, 0, 0}
|
|
|
#if __MINGW32_MAJOR_VERSION >= 1 || \
|
#if __MINGW32_MAJOR_VERSION >= 1 || \
|
(__MINGW32_MAJOR_VERSION == 0 && __MINGW32_MINOR_VERSION > 2)
|
(__MINGW32_MAJOR_VERSION == 0 && __MINGW32_MINOR_VERSION > 2)
|
#define MINGW32_SUPPORTS_MT_EH 1
|
#define MINGW32_SUPPORTS_MT_EH 1
|
/* Mingw runtime >= v0.3 provides a magic variable that is set to nonzero
|
/* Mingw runtime >= v0.3 provides a magic variable that is set to nonzero
|
if -mthreads option was specified, or 0 otherwise. This is to get around
|
if -mthreads option was specified, or 0 otherwise. This is to get around
|
the lack of weak symbols in PE-COFF. */
|
the lack of weak symbols in PE-COFF. */
|
extern int _CRT_MT;
|
extern int _CRT_MT;
|
extern int __mingwthr_key_dtor (unsigned long, void (*) (void *));
|
extern int __mingwthr_key_dtor (unsigned long, void (*) (void *));
|
#endif /* __MINGW32__ version */
|
#endif /* __MINGW32__ version */
|
|
|
/* The Windows95 kernel does not export InterlockedCompareExchange.
|
/* The Windows95 kernel does not export InterlockedCompareExchange.
|
This provides a substitute. When building apps that reference
|
This provides a substitute. When building apps that reference
|
gthread_mutex_try_lock, the __GTHREAD_I486_INLINE_LOCK_PRIMITIVES
|
gthread_mutex_try_lock, the __GTHREAD_I486_INLINE_LOCK_PRIMITIVES
|
macro must be defined if Windows95 is a target. Currently
|
macro must be defined if Windows95 is a target. Currently
|
gthread_mutex_try_lock is not referenced by libgcc or libstdc++. */
|
gthread_mutex_try_lock is not referenced by libgcc or libstdc++. */
|
#ifdef __GTHREAD_I486_INLINE_LOCK_PRIMITIVES
|
#ifdef __GTHREAD_I486_INLINE_LOCK_PRIMITIVES
|
static inline long
|
static inline long
|
__gthr_i486_lock_cmp_xchg(long *dest, long xchg, long comperand)
|
__gthr_i486_lock_cmp_xchg(long *dest, long xchg, long comperand)
|
{
|
{
|
long result;
|
long result;
|
__asm__ __volatile__ ("\n\
|
__asm__ __volatile__ ("\n\
|
lock\n\
|
lock\n\
|
cmpxchg{l} {%4, %1|%1, %4}\n"
|
cmpxchg{l} {%4, %1|%1, %4}\n"
|
: "=a" (result), "=m" (*dest)
|
: "=a" (result), "=m" (*dest)
|
: "0" (comperand), "m" (*dest), "r" (xchg)
|
: "0" (comperand), "m" (*dest), "r" (xchg)
|
: "cc");
|
: "cc");
|
return result;
|
return result;
|
}
|
}
|
#define __GTHR_W32_InterlockedCompareExchange __gthr_i486_lock_cmp_xchg
|
#define __GTHR_W32_InterlockedCompareExchange __gthr_i486_lock_cmp_xchg
|
#else /* __GTHREAD_I486_INLINE_LOCK_PRIMITIVES */
|
#else /* __GTHREAD_I486_INLINE_LOCK_PRIMITIVES */
|
#define __GTHR_W32_InterlockedCompareExchange InterlockedCompareExchange
|
#define __GTHR_W32_InterlockedCompareExchange InterlockedCompareExchange
|
#endif /* __GTHREAD_I486_INLINE_LOCK_PRIMITIVES */
|
#endif /* __GTHREAD_I486_INLINE_LOCK_PRIMITIVES */
|
|
|
static inline int
|
static inline int
|
__gthread_active_p (void)
|
__gthread_active_p (void)
|
{
|
{
|
#ifdef MINGW32_SUPPORTS_MT_EH
|
#ifdef MINGW32_SUPPORTS_MT_EH
|
return _CRT_MT;
|
return _CRT_MT;
|
#else
|
#else
|
return 1;
|
return 1;
|
#endif
|
#endif
|
}
|
}
|
|
|
#if __GTHREAD_HIDE_WIN32API
|
#if __GTHREAD_HIDE_WIN32API
|
|
|
/* The implementations are in config/i386/gthr-win32.c in libgcc.a.
|
/* The implementations are in config/i386/gthr-win32.c in libgcc.a.
|
Only stubs are exposed to avoid polluting the C++ namespace with
|
Only stubs are exposed to avoid polluting the C++ namespace with
|
windows api definitions. */
|
windows api definitions. */
|
|
|
extern int __gthr_win32_once (__gthread_once_t *, void (*) (void));
|
extern int __gthr_win32_once (__gthread_once_t *, void (*) (void));
|
extern int __gthr_win32_key_create (__gthread_key_t *, void (*) (void*));
|
extern int __gthr_win32_key_create (__gthread_key_t *, void (*) (void*));
|
extern int __gthr_win32_key_delete (__gthread_key_t);
|
extern int __gthr_win32_key_delete (__gthread_key_t);
|
extern void * __gthr_win32_getspecific (__gthread_key_t);
|
extern void * __gthr_win32_getspecific (__gthread_key_t);
|
extern int __gthr_win32_setspecific (__gthread_key_t, const void *);
|
extern int __gthr_win32_setspecific (__gthread_key_t, const void *);
|
extern void __gthr_win32_mutex_init_function (__gthread_mutex_t *);
|
extern void __gthr_win32_mutex_init_function (__gthread_mutex_t *);
|
extern int __gthr_win32_mutex_lock (__gthread_mutex_t *);
|
extern int __gthr_win32_mutex_lock (__gthread_mutex_t *);
|
extern int __gthr_win32_mutex_trylock (__gthread_mutex_t *);
|
extern int __gthr_win32_mutex_trylock (__gthread_mutex_t *);
|
extern int __gthr_win32_mutex_unlock (__gthread_mutex_t *);
|
extern int __gthr_win32_mutex_unlock (__gthread_mutex_t *);
|
extern void
|
extern void
|
__gthr_win32_recursive_mutex_init_function (__gthread_recursive_mutex_t *);
|
__gthr_win32_recursive_mutex_init_function (__gthread_recursive_mutex_t *);
|
extern int __gthr_win32_recursive_mutex_lock (__gthread_recursive_mutex_t *);
|
extern int __gthr_win32_recursive_mutex_lock (__gthread_recursive_mutex_t *);
|
extern int
|
extern int
|
__gthr_win32_recursive_mutex_trylock (__gthread_recursive_mutex_t *);
|
__gthr_win32_recursive_mutex_trylock (__gthread_recursive_mutex_t *);
|
extern int __gthr_win32_recursive_mutex_unlock (__gthread_recursive_mutex_t *);
|
extern int __gthr_win32_recursive_mutex_unlock (__gthread_recursive_mutex_t *);
|
|
|
static inline int
|
static inline int
|
__gthread_once (__gthread_once_t *once, void (*func) (void))
|
__gthread_once (__gthread_once_t *once, void (*func) (void))
|
{
|
{
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
return __gthr_win32_once (once, func);
|
return __gthr_win32_once (once, func);
|
else
|
else
|
return -1;
|
return -1;
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
|
__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
|
{
|
{
|
return __gthr_win32_key_create (key, dtor);
|
return __gthr_win32_key_create (key, dtor);
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_key_delete (__gthread_key_t key)
|
__gthread_key_delete (__gthread_key_t key)
|
{
|
{
|
return __gthr_win32_key_delete (key);
|
return __gthr_win32_key_delete (key);
|
}
|
}
|
|
|
static inline void *
|
static inline void *
|
__gthread_getspecific (__gthread_key_t key)
|
__gthread_getspecific (__gthread_key_t key)
|
{
|
{
|
return __gthr_win32_getspecific (key);
|
return __gthr_win32_getspecific (key);
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_setspecific (__gthread_key_t key, const void *ptr)
|
__gthread_setspecific (__gthread_key_t key, const void *ptr)
|
{
|
{
|
return __gthr_win32_setspecific (key, ptr);
|
return __gthr_win32_setspecific (key, ptr);
|
}
|
}
|
|
|
static inline void
|
static inline void
|
__gthread_mutex_init_function (__gthread_mutex_t *mutex)
|
__gthread_mutex_init_function (__gthread_mutex_t *mutex)
|
{
|
{
|
__gthr_win32_mutex_init_function (mutex);
|
__gthr_win32_mutex_init_function (mutex);
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_mutex_lock (__gthread_mutex_t *mutex)
|
__gthread_mutex_lock (__gthread_mutex_t *mutex)
|
{
|
{
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
return __gthr_win32_mutex_lock (mutex);
|
return __gthr_win32_mutex_lock (mutex);
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_mutex_trylock (__gthread_mutex_t *mutex)
|
__gthread_mutex_trylock (__gthread_mutex_t *mutex)
|
{
|
{
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
return __gthr_win32_mutex_trylock (mutex);
|
return __gthr_win32_mutex_trylock (mutex);
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_mutex_unlock (__gthread_mutex_t *mutex)
|
__gthread_mutex_unlock (__gthread_mutex_t *mutex)
|
{
|
{
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
return __gthr_win32_mutex_unlock (mutex);
|
return __gthr_win32_mutex_unlock (mutex);
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static inline void
|
static inline void
|
__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
|
__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
|
{
|
{
|
__gthr_win32_recursive_mutex_init_function (mutex);
|
__gthr_win32_recursive_mutex_init_function (mutex);
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
|
__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
|
{
|
{
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
return __gthr_win32_recursive_mutex_lock (mutex);
|
return __gthr_win32_recursive_mutex_lock (mutex);
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
|
__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
|
{
|
{
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
return __gthr_win32_recursive_mutex_trylock (mutex);
|
return __gthr_win32_recursive_mutex_trylock (mutex);
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
|
__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
|
{
|
{
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
return __gthr_win32_recursive_mutex_unlock (mutex);
|
return __gthr_win32_recursive_mutex_unlock (mutex);
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
#else /* ! __GTHREAD_HIDE_WIN32API */
|
#else /* ! __GTHREAD_HIDE_WIN32API */
|
|
|
#include <windows.h>
|
#include <windows.h>
|
#include <errno.h>
|
#include <errno.h>
|
|
|
static inline int
|
static inline int
|
__gthread_once (__gthread_once_t *once, void (*func) (void))
|
__gthread_once (__gthread_once_t *once, void (*func) (void))
|
{
|
{
|
if (! __gthread_active_p ())
|
if (! __gthread_active_p ())
|
return -1;
|
return -1;
|
else if (once == NULL || func == NULL)
|
else if (once == NULL || func == NULL)
|
return EINVAL;
|
return EINVAL;
|
|
|
if (! once->done)
|
if (! once->done)
|
{
|
{
|
if (InterlockedIncrement (&(once->started)) == 0)
|
if (InterlockedIncrement (&(once->started)) == 0)
|
{
|
{
|
(*func) ();
|
(*func) ();
|
once->done = TRUE;
|
once->done = TRUE;
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Another thread is currently executing the code, so wait for it
|
/* Another thread is currently executing the code, so wait for it
|
to finish; yield the CPU in the meantime. If performance
|
to finish; yield the CPU in the meantime. If performance
|
does become an issue, the solution is to use an Event that
|
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
|
we wait on here (and set above), but that implies a place to
|
create the event before this routine is called. */
|
create the event before this routine is called. */
|
while (! once->done)
|
while (! once->done)
|
Sleep (0);
|
Sleep (0);
|
}
|
}
|
}
|
}
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Windows32 thread local keys don't support destructors; this leads to
|
/* Windows32 thread local keys don't support destructors; this leads to
|
leaks, especially in threaded applications making extensive use of
|
leaks, especially in threaded applications making extensive use of
|
C++ EH. Mingw uses a thread-support DLL to work-around this problem. */
|
C++ EH. Mingw uses a thread-support DLL to work-around this problem. */
|
static inline int
|
static inline int
|
__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
|
__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
|
{
|
{
|
int status = 0;
|
int status = 0;
|
DWORD tls_index = TlsAlloc ();
|
DWORD tls_index = TlsAlloc ();
|
if (tls_index != 0xFFFFFFFF)
|
if (tls_index != 0xFFFFFFFF)
|
{
|
{
|
*key = tls_index;
|
*key = tls_index;
|
#ifdef MINGW32_SUPPORTS_MT_EH
|
#ifdef MINGW32_SUPPORTS_MT_EH
|
/* Mingw runtime will run the dtors in reverse order for each thread
|
/* Mingw runtime will run the dtors in reverse order for each thread
|
when the thread exits. */
|
when the thread exits. */
|
status = __mingwthr_key_dtor (*key, dtor);
|
status = __mingwthr_key_dtor (*key, dtor);
|
#endif
|
#endif
|
}
|
}
|
else
|
else
|
status = (int) GetLastError ();
|
status = (int) GetLastError ();
|
return status;
|
return status;
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_key_delete (__gthread_key_t key)
|
__gthread_key_delete (__gthread_key_t key)
|
{
|
{
|
return (TlsFree (key) != 0) ? 0 : (int) GetLastError ();
|
return (TlsFree (key) != 0) ? 0 : (int) GetLastError ();
|
}
|
}
|
|
|
static inline void *
|
static inline void *
|
__gthread_getspecific (__gthread_key_t key)
|
__gthread_getspecific (__gthread_key_t key)
|
{
|
{
|
DWORD lasterror;
|
DWORD lasterror;
|
void *ptr;
|
void *ptr;
|
|
|
lasterror = GetLastError ();
|
lasterror = GetLastError ();
|
|
|
ptr = TlsGetValue (key);
|
ptr = TlsGetValue (key);
|
|
|
SetLastError (lasterror);
|
SetLastError (lasterror);
|
|
|
return ptr;
|
return ptr;
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_setspecific (__gthread_key_t key, const void *ptr)
|
__gthread_setspecific (__gthread_key_t key, const void *ptr)
|
{
|
{
|
return (TlsSetValue (key, (void*) ptr) != 0) ? 0 : (int) GetLastError ();
|
return (TlsSetValue (key, (void*) ptr) != 0) ? 0 : (int) GetLastError ();
|
}
|
}
|
|
|
static inline void
|
static inline void
|
__gthread_mutex_init_function (__gthread_mutex_t *mutex)
|
__gthread_mutex_init_function (__gthread_mutex_t *mutex)
|
{
|
{
|
mutex->counter = -1;
|
mutex->counter = -1;
|
mutex->sema = CreateSemaphore (NULL, 0, 65535, NULL);
|
mutex->sema = CreateSemaphore (NULL, 0, 65535, NULL);
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_mutex_lock (__gthread_mutex_t *mutex)
|
__gthread_mutex_lock (__gthread_mutex_t *mutex)
|
{
|
{
|
int status = 0;
|
int status = 0;
|
|
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
{
|
{
|
if (InterlockedIncrement (&mutex->counter) == 0 ||
|
if (InterlockedIncrement (&mutex->counter) == 0 ||
|
WaitForSingleObject (mutex->sema, INFINITE) == WAIT_OBJECT_0)
|
WaitForSingleObject (mutex->sema, INFINITE) == WAIT_OBJECT_0)
|
status = 0;
|
status = 0;
|
else
|
else
|
{
|
{
|
/* WaitForSingleObject returns WAIT_FAILED, and we can only do
|
/* WaitForSingleObject returns WAIT_FAILED, and we can only do
|
some best-effort cleanup here. */
|
some best-effort cleanup here. */
|
InterlockedDecrement (&mutex->counter);
|
InterlockedDecrement (&mutex->counter);
|
status = 1;
|
status = 1;
|
}
|
}
|
}
|
}
|
return status;
|
return status;
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_mutex_trylock (__gthread_mutex_t *mutex)
|
__gthread_mutex_trylock (__gthread_mutex_t *mutex)
|
{
|
{
|
int status = 0;
|
int status = 0;
|
|
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
{
|
{
|
if (__GTHR_W32_InterlockedCompareExchange (&mutex->counter, 0, -1) < 0)
|
if (__GTHR_W32_InterlockedCompareExchange (&mutex->counter, 0, -1) < 0)
|
status = 0;
|
status = 0;
|
else
|
else
|
status = 1;
|
status = 1;
|
}
|
}
|
return status;
|
return status;
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_mutex_unlock (__gthread_mutex_t *mutex)
|
__gthread_mutex_unlock (__gthread_mutex_t *mutex)
|
{
|
{
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
{
|
{
|
if (InterlockedDecrement (&mutex->counter) >= 0)
|
if (InterlockedDecrement (&mutex->counter) >= 0)
|
return ReleaseSemaphore (mutex->sema, 1, NULL) ? 0 : 1;
|
return ReleaseSemaphore (mutex->sema, 1, NULL) ? 0 : 1;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static inline void
|
static inline void
|
__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
|
__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
|
{
|
{
|
mutex->counter = -1;
|
mutex->counter = -1;
|
mutex->depth = 0;
|
mutex->depth = 0;
|
mutex->owner = 0;
|
mutex->owner = 0;
|
mutex->sema = CreateSemaphore (NULL, 0, 65535, NULL);
|
mutex->sema = CreateSemaphore (NULL, 0, 65535, NULL);
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
|
__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
|
{
|
{
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
{
|
{
|
DWORD me = GetCurrentThreadId();
|
DWORD me = GetCurrentThreadId();
|
if (InterlockedIncrement (&mutex->counter) == 0)
|
if (InterlockedIncrement (&mutex->counter) == 0)
|
{
|
{
|
mutex->depth = 1;
|
mutex->depth = 1;
|
mutex->owner = me;
|
mutex->owner = me;
|
}
|
}
|
else if (mutex->owner == me)
|
else if (mutex->owner == me)
|
{
|
{
|
InterlockedDecrement (&mutex->counter);
|
InterlockedDecrement (&mutex->counter);
|
++(mutex->depth);
|
++(mutex->depth);
|
}
|
}
|
else if (WaitForSingleObject (mutex->sema, INFINITE) == WAIT_OBJECT_0)
|
else if (WaitForSingleObject (mutex->sema, INFINITE) == WAIT_OBJECT_0)
|
{
|
{
|
mutex->depth = 1;
|
mutex->depth = 1;
|
mutex->owner = me;
|
mutex->owner = me;
|
}
|
}
|
else
|
else
|
{
|
{
|
/* WaitForSingleObject returns WAIT_FAILED, and we can only do
|
/* WaitForSingleObject returns WAIT_FAILED, and we can only do
|
some best-effort cleanup here. */
|
some best-effort cleanup here. */
|
InterlockedDecrement (&mutex->counter);
|
InterlockedDecrement (&mutex->counter);
|
return 1;
|
return 1;
|
}
|
}
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
|
__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
|
{
|
{
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
{
|
{
|
DWORD me = GetCurrentThreadId();
|
DWORD me = GetCurrentThreadId();
|
if (__GTHR_W32_InterlockedCompareExchange (&mutex->counter, 0, -1) < 0)
|
if (__GTHR_W32_InterlockedCompareExchange (&mutex->counter, 0, -1) < 0)
|
{
|
{
|
mutex->depth = 1;
|
mutex->depth = 1;
|
mutex->owner = me;
|
mutex->owner = me;
|
}
|
}
|
else if (mutex->owner == me)
|
else if (mutex->owner == me)
|
++(mutex->depth);
|
++(mutex->depth);
|
else
|
else
|
return 1;
|
return 1;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static inline int
|
static inline int
|
__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
|
__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
|
{
|
{
|
if (__gthread_active_p ())
|
if (__gthread_active_p ())
|
{
|
{
|
--(mutex->depth);
|
--(mutex->depth);
|
if (mutex->depth == 0)
|
if (mutex->depth == 0)
|
{
|
{
|
mutex->owner = 0;
|
mutex->owner = 0;
|
|
|
if (InterlockedDecrement (&mutex->counter) >= 0)
|
if (InterlockedDecrement (&mutex->counter) >= 0)
|
return ReleaseSemaphore (mutex->sema, 1, NULL) ? 0 : 1;
|
return ReleaseSemaphore (mutex->sema, 1, NULL) ? 0 : 1;
|
}
|
}
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
#endif /* __GTHREAD_HIDE_WIN32API */
|
#endif /* __GTHREAD_HIDE_WIN32API */
|
|
|
#ifdef __cplusplus
|
#ifdef __cplusplus
|
}
|
}
|
#endif
|
#endif
|
|
|
#endif /* _LIBOBJC */
|
#endif /* _LIBOBJC */
|
|
|
#endif /* ! GCC_GTHR_WIN32_H */
|
#endif /* ! GCC_GTHR_WIN32_H */
|
|
|
