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-rw-r--r--contrib/gcc/gthr-win32.h263
1 files changed, 179 insertions, 84 deletions
diff --git a/contrib/gcc/gthr-win32.h b/contrib/gcc/gthr-win32.h
index 97d5a82..38b8f04 100644
--- a/contrib/gcc/gthr-win32.h
+++ b/contrib/gcc/gthr-win32.h
@@ -31,12 +31,12 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
#define GCC_GTHR_WIN32_H
/* 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.
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
+ 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
@@ -47,18 +47,18 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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
+ 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
+ This may cause incorrect error return due to truncation values on
hw where sizeof (DWORD) > sizeof (int).
-
- 3. We might consider using Critical Sections instead of Windows32
- mutexes for better performance, but emulating __gthread_mutex_trylock
+
+ 3. We might consider using Critical Sections instead of Windows32
+ mutexes for better performance, but emulating __gthread_mutex_trylock
interface becomes more complicated (Win9x does not support
TryEnterCriticalSectioni, while NT does).
-
+
The basic framework should work well enough. In the long term, GCC
needs to use Structured Exception Handling on Windows32. */
@@ -72,25 +72,25 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
#ifdef _LIBOBJC
/* This is necessary to prevent windef.h (included from windows.h) from
- defining it's own BOOL as a typedef. */
+ defining it's own BOOL as a typedef. */
#ifndef __OBJC__
#define __OBJC__
#endif
#include <windows.h>
-/* Now undef the windows BOOL. */
+/* Now undef the windows BOOL. */
#undef BOOL
/* 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 */
/* Initialize the threads subsystem. */
int
-__gthread_objc_init_thread_system(void)
+__gthread_objc_init_thread_system (void)
{
/* Initialize the thread storage key */
- if ((__gthread_objc_data_tls = TlsAlloc()) != (DWORD)-1)
+ if ((__gthread_objc_data_tls = TlsAlloc ()) != (DWORD) -1)
return 0;
else
return -1;
@@ -98,10 +98,10 @@ __gthread_objc_init_thread_system(void)
/* Close the threads subsystem. */
int
-__gthread_objc_close_thread_system(void)
+__gthread_objc_close_thread_system (void)
{
- if (__gthread_objc_data_tls != (DWORD)-1)
- TlsFree(__gthread_objc_data_tls);
+ if (__gthread_objc_data_tls != (DWORD) -1)
+ TlsFree (__gthread_objc_data_tls);
return 0;
}
@@ -109,21 +109,21 @@ __gthread_objc_close_thread_system(void)
/* Create a new thread of execution. */
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;
HANDLE win32_handle;
- if (!(win32_handle = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)func,
- arg, 0, &thread_id)))
+ if (!(win32_handle = CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE) func,
+ arg, 0, &thread_id)))
thread_id = 0;
-
- return (objc_thread_t)thread_id;
+
+ return (objc_thread_t) thread_id;
}
/* Set the current thread's priority. */
int
-__gthread_objc_thread_set_priority(int priority)
+__gthread_objc_thread_set_priority (int priority)
{
int sys_priority = 0;
@@ -142,7 +142,7 @@ __gthread_objc_thread_set_priority(int priority)
}
/* Change priority */
- if (SetThreadPriority(GetCurrentThread(), sys_priority))
+ if (SetThreadPriority (GetCurrentThread (), sys_priority))
return 0;
else
return -1;
@@ -150,12 +150,12 @@ __gthread_objc_thread_set_priority(int priority)
/* Return the current thread's priority. */
int
-__gthread_objc_thread_get_priority(void)
+__gthread_objc_thread_get_priority (void)
{
int sys_priority;
- sys_priority = GetThreadPriority(GetCurrentThread());
-
+ sys_priority = GetThreadPriority (GetCurrentThread ());
+
switch (sys_priority)
{
case THREAD_PRIORITY_HIGHEST:
@@ -167,7 +167,7 @@ __gthread_objc_thread_get_priority(void)
default:
case THREAD_PRIORITY_BELOW_NORMAL:
return OBJC_THREAD_BACKGROUND_PRIORITY;
-
+
case THREAD_PRIORITY_IDLE:
case THREAD_PRIORITY_LOWEST:
return OBJC_THREAD_LOW_PRIORITY;
@@ -179,17 +179,17 @@ __gthread_objc_thread_get_priority(void)
/* Yield our process time to another thread. */
void
-__gthread_objc_thread_yield(void)
+__gthread_objc_thread_yield (void)
{
- Sleep(0);
+ Sleep (0);
}
/* Terminate the current thread. */
int
-__gthread_objc_thread_exit(void)
+__gthread_objc_thread_exit (void)
{
/* exit the thread */
- ExitThread(__objc_thread_exit_status);
+ ExitThread (__objc_thread_exit_status);
/* Failed if we reached here */
return -1;
@@ -197,16 +197,16 @@ __gthread_objc_thread_exit(void)
/* Returns an integer value which uniquely describes a thread. */
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. */
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;
else
return -1;
@@ -214,16 +214,16 @@ __gthread_objc_thread_set_data(void *value)
/* Returns the thread's local storage pointer. */
void *
-__gthread_objc_thread_get_data(void)
+__gthread_objc_thread_get_data (void)
{
DWORD lasterror;
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;
}
@@ -232,9 +232,9 @@ __gthread_objc_thread_get_data(void)
/* Allocate a mutex. */
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;
else
return 0;
@@ -242,19 +242,19 @@ __gthread_objc_mutex_allocate(objc_mutex_t mutex)
/* Deallocate a mutex. */
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;
}
/* Grab a lock on a mutex. */
int
-__gthread_objc_mutex_lock(objc_mutex_t mutex)
+__gthread_objc_mutex_lock (objc_mutex_t mutex)
{
int status;
- status = WaitForSingleObject((HANDLE)(mutex->backend), INFINITE);
+ status = WaitForSingleObject ((HANDLE) (mutex->backend), INFINITE);
if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED)
return -1;
else
@@ -263,11 +263,11 @@ __gthread_objc_mutex_lock(objc_mutex_t mutex)
/* Try to grab a lock on a mutex. */
int
-__gthread_objc_mutex_trylock(objc_mutex_t mutex)
+__gthread_objc_mutex_trylock (objc_mutex_t mutex)
{
int status;
- status = WaitForSingleObject((HANDLE)(mutex->backend), 0);
+ status = WaitForSingleObject ((HANDLE) (mutex->backend), 0);
if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED)
return -1;
else
@@ -276,9 +276,9 @@ __gthread_objc_mutex_trylock(objc_mutex_t mutex)
/* Unlock the mutex */
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;
else
return 0;
@@ -288,7 +288,7 @@ __gthread_objc_mutex_unlock(objc_mutex_t mutex)
/* Allocate a condition. */
int
-__gthread_objc_condition_allocate(objc_condition_t condition)
+__gthread_objc_condition_allocate (objc_condition_t condition)
{
/* Unimplemented. */
return -1;
@@ -296,7 +296,7 @@ __gthread_objc_condition_allocate(objc_condition_t condition)
/* Deallocate a condition. */
int
-__gthread_objc_condition_deallocate(objc_condition_t condition)
+__gthread_objc_condition_deallocate (objc_condition_t condition)
{
/* Unimplemented. */
return -1;
@@ -304,7 +304,7 @@ __gthread_objc_condition_deallocate(objc_condition_t condition)
/* Wait on the condition */
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. */
return -1;
@@ -312,7 +312,7 @@ __gthread_objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
/* Wake up all threads waiting on this condition. */
int
-__gthread_objc_condition_broadcast(objc_condition_t condition)
+__gthread_objc_condition_broadcast (objc_condition_t condition)
{
/* Unimplemented. */
return -1;
@@ -320,7 +320,7 @@ __gthread_objc_condition_broadcast(objc_condition_t condition)
/* Wake up one thread waiting on this condition. */
int
-__gthread_objc_condition_signal(objc_condition_t condition)
+__gthread_objc_condition_signal (objc_condition_t condition)
{
/* Unimplemented. */
return -1;
@@ -328,36 +328,32 @@ __gthread_objc_condition_signal(objc_condition_t condition)
#else /* _LIBOBJC */
-#include <windows.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
-typedef DWORD __gthread_key_t;
+typedef unsigned long __gthread_key_t;
typedef struct {
int done;
long started;
} __gthread_once_t;
-typedef HANDLE __gthread_mutex_t;
+typedef void* __gthread_mutex_t;
-#define __GTHREAD_ONCE_INIT {FALSE, -1}
+#define __GTHREAD_ONCE_INIT {0, -1}
#define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function
+#define __GTHREAD_MUTEX_INIT_DEFAULT 0
#if __MINGW32_MAJOR_VERSION >= 1 || \
(__MINGW32_MAJOR_VERSION == 0 && __MINGW32_MINOR_VERSION > 2)
#define MINGW32_SUPPORTS_MT_EH 1
-#ifdef __cplusplus
-extern "C" {
-#endif
-extern int __mingwthr_key_dtor (DWORD, void (*) (void *));
-#ifdef __cplusplus
-}
-#endif
-
-/* Mingw runtime >= v0.3 provides a magic variable that is set to non-zero
- if -mthreads option was specified, or 0 otherwise. This is to get around
+/* 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
the lack of weak symbols in PE-COFF. */
extern int _CRT_MT;
-#endif
+extern int __mingwthr_key_dtor (unsigned long, void (*) (void *));
+#endif /* __MINGW32__ version */
static inline int
__gthread_active_p (void)
@@ -369,6 +365,100 @@ __gthread_active_p (void)
#endif
}
+#ifdef __GTHREAD_HIDE_WIN32API
+
+/* The implementations are in config/i386/gthr-win32.c in libgcc.a.
+ Only stubs are exposed to avoid polluting the C++ namespace with
+ windows api definitions. */
+
+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_delete (__gthread_key_t);
+extern void * __gthr_win32_getspecific (__gthread_key_t);
+extern int __gthr_win32_setspecific (__gthread_key_t, const void *);
+extern void __gthr_win32_mutex_init_function (__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_unlock (__gthread_mutex_t *);
+
+static inline int
+__gthread_once (__gthread_once_t *once, void (*func) (void))
+{
+ if (__gthread_active_p ())
+ return __gthr_win32_once (once, func);
+ else
+ return -1;
+}
+
+static inline int
+__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
+{
+ return __gthr_win32_key_create (key, dtor);
+}
+
+static inline int
+__gthread_key_dtor (__gthread_key_t key, void *ptr)
+{
+ /* Nothing needed. */
+ return 0;
+}
+
+static inline int
+__gthread_key_delete (__gthread_key_t key)
+{
+ return __gthr_win32_key_delete (key);
+}
+
+static inline void *
+__gthread_getspecific (__gthread_key_t key)
+{
+ return __gthr_win32_getspecific (key);
+}
+
+static inline int
+__gthread_setspecific (__gthread_key_t key, const void *ptr)
+{
+ return __gthr_win32_setspecific (key, ptr);
+}
+
+static inline void
+__gthread_mutex_init_function (__gthread_mutex_t *mutex)
+{
+ __gthr_win32_mutex_init_function (mutex);
+}
+
+static inline int
+__gthread_mutex_lock (__gthread_mutex_t *mutex)
+{
+ if (__gthread_active_p ())
+ return __gthr_win32_mutex_lock (mutex);
+ else
+ return 0;
+}
+
+static inline int
+__gthread_mutex_trylock (__gthread_mutex_t *mutex)
+{
+ if (__gthread_active_p ())
+ return __gthr_win32_mutex_trylock (mutex);
+ else
+ return 0;
+}
+
+static inline int
+__gthread_mutex_unlock (__gthread_mutex_t *mutex)
+{
+ if (__gthread_active_p ())
+ return __gthr_win32_mutex_unlock (mutex);
+ else
+ return 0;
+}
+
+#else /* ! __GTHREAD_HIDE_WIN32API */
+
+#include <windows.h>
+#include <errno.h>
+
static inline int
__gthread_once (__gthread_once_t *once, void (*func) (void))
{
@@ -380,27 +470,27 @@ __gthread_once (__gthread_once_t *once, void (*func) (void))
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. */
+ /* 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
+ leaks, especially in threaded applications making extensive use of
C++ EH. Mingw uses a thread-support DLL to work-around this problem. */
static inline int
__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
@@ -422,7 +512,7 @@ __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
}
/* Currently, this routine is called only for Mingw runtime, and if
- -mthreads option is chosen to link in the thread support DLL. */
+ -mthreads option is chosen to link in the thread support DLL. */
static inline int
__gthread_key_dtor (__gthread_key_t key, void *ptr)
{
@@ -442,11 +532,11 @@ __gthread_getspecific (__gthread_key_t key)
DWORD lasterror;
void *ptr;
- lasterror = GetLastError();
+ lasterror = GetLastError ();
- ptr = TlsGetValue(key);
+ ptr = TlsGetValue (key);
- SetLastError( lasterror );
+ SetLastError (lasterror);
return ptr;
}
@@ -460,7 +550,7 @@ __gthread_setspecific (__gthread_key_t key, const void *ptr)
static inline void
__gthread_mutex_init_function (__gthread_mutex_t *mutex)
{
- /* Create unnamed mutex with default security attr and no initial owner. */
+ /* Create unnamed mutex with default security attr and no initial owner. */
*mutex = CreateMutex (NULL, 0, NULL);
}
@@ -503,7 +593,12 @@ __gthread_mutex_unlock (__gthread_mutex_t *mutex)
return 0;
}
+#endif /* __GTHREAD_HIDE_WIN32API */
+
+#ifdef __cplusplus
+}
+#endif
+
#endif /* _LIBOBJC */
#endif /* ! GCC_GTHR_WIN32_H */
-
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