diff options
Diffstat (limited to 'contrib/gcc/gthr-win32.h')
| -rw-r--r-- | contrib/gcc/gthr-win32.h | 263 |
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 */ - |
