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#ifndef _WIN32THREAD_H
#define _WIN32THREAD_H
typedef struct win32_cond { LONG waiters; HANDLE sem; } perl_cond;
typedef DWORD perl_key;
typedef HANDLE perl_thread;
/* XXX Critical Sections used instead of mutexes: lightweight,
* but can't be communicated to child processes, and can't get
* HANDLE to it for use elsewhere
*/
#ifndef DONT_USE_CRITICAL_SECTION
typedef CRITICAL_SECTION perl_mutex;
#define MUTEX_INIT(m) InitializeCriticalSection(m)
#define MUTEX_LOCK(m) EnterCriticalSection(m)
#define MUTEX_UNLOCK(m) LeaveCriticalSection(m)
#define MUTEX_DESTROY(m) DeleteCriticalSection(m)
#else
typedef HANDLE perl_mutex;
#define MUTEX_INIT(m) \
STMT_START { \
if ((*(m) = CreateMutex(NULL,FALSE,NULL)) == NULL) \
croak("panic: MUTEX_INIT"); \
} STMT_END
#define MUTEX_LOCK(m) \
STMT_START { \
if (WaitForSingleObject(*(m),INFINITE) == WAIT_FAILED) \
croak("panic: MUTEX_LOCK"); \
} STMT_END
#define MUTEX_UNLOCK(m) \
STMT_START { \
if (ReleaseMutex(*(m)) == 0) \
croak("panic: MUTEX_UNLOCK"); \
} STMT_END
#define MUTEX_DESTROY(m) \
STMT_START { \
if (CloseHandle(*(m)) == 0) \
croak("panic: MUTEX_DESTROY"); \
} STMT_END
#endif
/* These macros assume that the mutex associated with the condition
* will always be held before COND_{SIGNAL,BROADCAST,WAIT,DESTROY},
* so there's no separate mutex protecting access to (c)->waiters
*/
#define COND_INIT(c) \
STMT_START { \
(c)->waiters = 0; \
(c)->sem = CreateSemaphore(NULL,0,LONG_MAX,NULL); \
if ((c)->sem == NULL) \
croak("panic: COND_INIT (%ld)",GetLastError()); \
} STMT_END
#define COND_SIGNAL(c) \
STMT_START { \
if (ReleaseSemaphore((c)->sem,1,NULL) == 0) \
croak("panic: COND_SIGNAL (%ld)",GetLastError()); \
} STMT_END
#define COND_BROADCAST(c) \
STMT_START { \
if ((c)->waiters > 0 && \
ReleaseSemaphore((c)->sem,(c)->waiters,NULL) == 0) \
croak("panic: COND_BROADCAST (%ld)",GetLastError());\
} STMT_END
#define COND_WAIT(c, m) \
STMT_START { \
(c)->waiters++; \
MUTEX_UNLOCK(m); \
/* Note that there's no race here, since a \
* COND_BROADCAST() on another thread will have seen the\
* right number of waiters (i.e. including this one) */ \
if (WaitForSingleObject((c)->sem,INFINITE)==WAIT_FAILED)\
croak("panic: COND_WAIT (%ld)",GetLastError()); \
MUTEX_LOCK(m); \
(c)->waiters--; \
} STMT_END
#define COND_DESTROY(c) \
STMT_START { \
(c)->waiters = 0; \
if (CloseHandle((c)->sem) == 0) \
croak("panic: COND_DESTROY (%ld)",GetLastError()); \
} STMT_END
#define DETACH(t) \
STMT_START { \
if (CloseHandle((t)->self) == 0) { \
MUTEX_UNLOCK(&(t)->mutex); \
croak("panic: DETACH"); \
} \
} STMT_END
#define THR ((struct thread *) TlsGetValue(thr_key))
#define THREAD_CREATE(t, f) Perl_thread_create(t, f)
#define THREAD_POST_CREATE(t) NOOP
#define THREAD_RET_TYPE DWORD WINAPI
#define THREAD_RET_CAST(p) ((DWORD)(p))
typedef THREAD_RET_TYPE thread_func_t(void *);
#define HAVE_THREAD_INTERN
START_EXTERN_C
void Perl_init_thread_intern _((struct thread *thr));
int Perl_thread_create _((struct thread *thr, thread_func_t *fn));
END_EXTERN_C
#define JOIN(t, avp) \
STMT_START { \
if ((WaitForSingleObject((t)->self,INFINITE) == WAIT_FAILED) \
|| (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0)) \
croak("panic: JOIN"); \
} STMT_END
#define SET_THR(t) \
STMT_START { \
if (TlsSetValue(thr_key, (void *) (t)) == 0) \
croak("panic: TlsSetValue"); \
} STMT_END
#define YIELD Sleep(0)
#endif /* _WIN32THREAD_H */
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