-/* Threads compatibily routines for libgcc2. */
+/* Threads compatibility routines for libgcc2 and libobjc. */
/* Compile this one with gcc. */
/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
Contributed by Mumit Khan <khan@xraylith.wisc.edu>.
This exception does not however invalidate any other reasons why
the executable file might be covered by the GNU General Public License. */
-#ifndef __gthr_win32_h
-#define __gthr_win32_h
+#ifndef GCC_GTHR_WIN32_H
+#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
#include <_mingw.h>
#endif
+#ifdef _LIBOBJC
+
+/* Key structure for maintaining thread specific storage */
+static DWORD __gthread_objc_data_tls = (DWORD)-1;
+
+/* Backend initialization functions */
+
+/* Initialize the threads subsystem. */
+int
+__gthread_objc_init_thread_system(void)
+{
+ /* Initialize the thread storage key */
+ if ((__gthread_objc_data_tls = TlsAlloc()) != (DWORD)-1)
+ return 0;
+ else
+ return -1;
+}
+
+/* Close the threads subsystem. */
+int
+__gthread_objc_close_thread_system(void)
+{
+ if (__gthread_objc_data_tls != (DWORD)-1)
+ TlsFree(__gthread_objc_data_tls);
+ return 0;
+}
+
+/* Backend thread functions */
+
+/* Create a new thread of execution. */
+objc_thread_t
+__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)))
+ thread_id = 0;
+
+ return (objc_thread_t)thread_id;
+}
+
+/* Set the current thread's priority. */
+int
+__gthread_objc_thread_set_priority(int priority)
+{
+ int sys_priority = 0;
+
+ switch (priority)
+ {
+ case OBJC_THREAD_INTERACTIVE_PRIORITY:
+ sys_priority = THREAD_PRIORITY_NORMAL;
+ break;
+ default:
+ case OBJC_THREAD_BACKGROUND_PRIORITY:
+ sys_priority = THREAD_PRIORITY_BELOW_NORMAL;
+ break;
+ case OBJC_THREAD_LOW_PRIORITY:
+ sys_priority = THREAD_PRIORITY_LOWEST;
+ break;
+ }
+
+ /* Change priority */
+ if (SetThreadPriority(GetCurrentThread(), sys_priority))
+ return 0;
+ else
+ return -1;
+}
+
+/* Return the current thread's priority. */
+int
+__gthread_objc_thread_get_priority(void)
+{
+ int sys_priority;
+
+ sys_priority = GetThreadPriority(GetCurrentThread());
+
+ switch (sys_priority)
+ {
+ case THREAD_PRIORITY_HIGHEST:
+ case THREAD_PRIORITY_TIME_CRITICAL:
+ case THREAD_PRIORITY_ABOVE_NORMAL:
+ case THREAD_PRIORITY_NORMAL:
+ return OBJC_THREAD_INTERACTIVE_PRIORITY;
+
+ default:
+ case THREAD_PRIORITY_BELOW_NORMAL:
+ return OBJC_THREAD_BACKGROUND_PRIORITY;
+
+ case THREAD_PRIORITY_IDLE:
+ case THREAD_PRIORITY_LOWEST:
+ return OBJC_THREAD_LOW_PRIORITY;
+ }
+
+ /* Couldn't get priority. */
+ return -1;
+}
+
+/* Yield our process time to another thread. */
+void
+__gthread_objc_thread_yield(void)
+{
+ Sleep(0);
+}
+
+/* Terminate the current thread. */
+int
+__gthread_objc_thread_exit(void)
+{
+ /* exit the thread */
+ ExitThread(__gthread_objc_thread_exit_status);
+
+ /* Failed if we reached here */
+ return -1;
+}
+
+/* Returns an integer value which uniquely describes a thread. */
+objc_thread_t
+__gthread_objc_thread_id(void)
+{
+ return (objc_thread_t)GetCurrentThreadId();
+}
+
+/* Sets the thread's local storage pointer. */
+int
+__gthread_objc_thread_set_data(void *value)
+{
+ if (TlsSetValue(__gthread_objc_data_tls, value))
+ return 0;
+ else
+ return -1;
+}
+
+/* Returns the thread's local storage pointer. */
+void *
+__gthread_objc_thread_get_data(void)
+{
+ DWORD lasterror;
+ void *ptr;
+
+ lasterror = GetLastError();
+
+ ptr = TlsGetValue(__gthread_objc_data_tls); /* Return thread data. */
+
+ SetLastError( lasterror );
+
+ return ptr;
+}
+
+/* Backend mutex functions */
+
+/* Allocate a mutex. */
+int
+__gthread_objc_mutex_allocate(objc_mutex_t mutex)
+{
+ if ((mutex->backend = (void *)CreateMutex(NULL, 0, NULL)) == NULL)
+ return -1;
+ else
+ return 0;
+}
+
+/* Deallocate a mutex. */
+int
+__gthread_objc_mutex_deallocate(objc_mutex_t mutex)
+{
+ CloseHandle((HANDLE)(mutex->backend));
+ return 0;
+}
+
+/* Grab a lock on a mutex. */
+int
+__gthread_objc_mutex_lock(objc_mutex_t mutex)
+{
+ int status;
+
+ status = WaitForSingleObject((HANDLE)(mutex->backend), INFINITE);
+ if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED)
+ return -1;
+ else
+ return 0;
+}
+
+/* Try to grab a lock on a mutex. */
+int
+__gthread_objc_mutex_trylock(objc_mutex_t mutex)
+{
+ int status;
+
+ status = WaitForSingleObject((HANDLE)(mutex->backend), 0);
+ if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED)
+ return -1;
+ else
+ return 0;
+}
+
+/* Unlock the mutex */
+int
+__gthread_objc_mutex_unlock(objc_mutex_t mutex)
+{
+ if (ReleaseMutex((HANDLE)(mutex->backend)) == 0)
+ return -1;
+ else
+ return 0;
+}
+
+/* Backend condition mutex functions */
+
+/* Allocate a condition. */
+int
+__gthread_objc_condition_allocate(objc_condition_t condition)
+{
+ /* Unimplemented. */
+ return -1;
+}
+
+/* Deallocate a condition. */
+int
+__gthread_objc_condition_deallocate(objc_condition_t condition)
+{
+ /* Unimplemented. */
+ return -1;
+}
+
+/* Wait on the condition */
+int
+__gthread_objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
+{
+ /* Unimplemented. */
+ return -1;
+}
+
+/* Wake up all threads waiting on this condition. */
+int
+__gthread_objc_condition_broadcast(objc_condition_t condition)
+{
+ /* Unimplemented. */
+ return -1;
+}
+
+/* Wake up one thread waiting on this condition. */
+int
+__gthread_objc_condition_signal(objc_condition_t condition)
+{
+ /* Unimplemented. */
+ return -1;
+}
+
+#else /* _LIBOBJC */
+
+#ifdef __MINGW32__
+#include <_mingw.h>
+#endif
+
typedef DWORD __gthread_key_t;
typedef struct {
#if __MINGW32_MAJOR_VERSION >= 1 || \
(__MINGW32_MAJOR_VERSION == 0 && __MINGW32_MINOR_VERSION > 2)
#define MINGW32_SUPPORTS_MT_EH 1
-extern int __mingwthr_key_dtor PROTO((DWORD, void (*) (void *)));
+extern int __mingwthr_key_dtor PARAMS ((DWORD, void (*) (void *)));
/* 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
the lack of weak symbols in PE-COFF. */
#endif
static inline int
-__gthread_active_p ()
+__gthread_active_p (void)
{
#ifdef MINGW32_SUPPORTS_MT_EH
return _CRT_MT;
}
static inline int
-__gthread_once (__gthread_once_t *once, void (*func) ())
+__gthread_once (__gthread_once_t *once, void (*func) (void))
{
if (! __gthread_active_p ())
return -1;
static inline void *
__gthread_getspecific (__gthread_key_t key)
{
- return TlsGetValue (key);
+ DWORD lasterror;
+ void *ptr;
+
+ lasterror = GetLastError();
+
+ ptr = TlsGetValue(key);
+
+ SetLastError( lasterror );
+
+ return ptr;
}
static inline int
return 0;
}
-#endif /* not __gthr_win32_h */
+#endif /* _LIBOBJC */
+
+#endif /* ! GCC_GTHR_WIN32_H */
OSDN Git Service
