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#ifndef _WIN32THREAD_H
#define _WIN32THREAD_H
#include "win32.h"
typedef struct win32_cond { LONG waiters; HANDLE sem; } perl_cond;
typedef DWORD perl_key;
typedef HANDLE perl_os_thread;
#ifndef DONT_USE_CRITICAL_SECTION
/* 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.
*/
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) \
Perl_croak_nocontext("panic: MUTEX_INIT"); \
} STMT_END
# define MUTEX_LOCK(m) \
STMT_START { \
if (WaitForSingleObject(*(m),INFINITE) == WAIT_FAILED) \
Perl_croak_nocontext("panic: MUTEX_LOCK"); \
} STMT_END
# define MUTEX_UNLOCK(m) \
STMT_START { \
if (ReleaseMutex(*(m)) == 0) \
Perl_croak_nocontext("panic: MUTEX_UNLOCK"); \
} STMT_END
# define MUTEX_DESTROY(m) \
STMT_START { \
if (CloseHandle(*(m)) == 0) \
Perl_croak_nocontext("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) \
Perl_croak_nocontext("panic: COND_INIT (%ld)",GetLastError()); \
} STMT_END
#define COND_SIGNAL(c) \
STMT_START { \
if ((c)->waiters > 0 && \
ReleaseSemaphore((c)->sem,1,NULL) == 0) \
Perl_croak_nocontext("panic: COND_SIGNAL (%ld)",GetLastError()); \
} STMT_END
#define COND_BROADCAST(c) \
STMT_START { \
if ((c)->waiters > 0 && \
ReleaseSemaphore((c)->sem,(c)->waiters,NULL) == 0) \
Perl_croak_nocontext("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)\
Perl_croak_nocontext("panic: COND_WAIT (%ld)",GetLastError()); \
/* XXX there may be an inconsequential race here */ \
MUTEX_LOCK(m); \
(c)->waiters--; \
} STMT_END
#define COND_DESTROY(c) \
STMT_START { \
(c)->waiters = 0; \
if (CloseHandle((c)->sem) == 0) \
Perl_croak_nocontext("panic: COND_DESTROY (%ld)",GetLastError()); \
} STMT_END
#define DETACH(t) \
STMT_START { \
if (CloseHandle((t)->self) == 0) { \
MUTEX_UNLOCK(&(t)->mutex); \
Perl_croak_nocontext("panic: DETACH"); \
} \
} STMT_END
#define THREAD_CREATE(t, f) Perl_thread_create(t, f)
#define THREAD_POST_CREATE(t) NOOP
/* XXX Docs mention that the RTL versions of thread creation routines
* should be used, but that advice only seems applicable when the RTL
* is not in a DLL. RTL DLLs in both Borland and VC seem to do all of
* the init/deinit required upon DLL_THREAD_ATTACH/DETACH. So we seem
* to be completely safe using straight Win32 API calls, rather than
* the much braindamaged RTL calls.
*
* _beginthread() in the RTLs call CloseHandle() just after the thread
* function returns, which means: 1) we have a race on our hands
* 2) it is impossible to implement join() semantics.
*
* IOW, do *NOT* turn on USE_RTL_THREAD_API! It is here
* for experimental purposes only. GSAR 98-01-02
*/
#ifdef USE_RTL_THREAD_API
# include <process.h>
# if defined(__BORLANDC__)
/* Borland RTL doesn't allow a return value from thread function! */
# define THREAD_RET_TYPE void _USERENTRY
# define THREAD_RET_CAST(p) ((void)(thr->i.retv = (void *)(p)))
# elif defined (_MSC_VER)
# define THREAD_RET_TYPE unsigned __stdcall
# define THREAD_RET_CAST(p) ((unsigned)(p))
# else
/* CRTDLL.DLL doesn't allow a return value from thread function! */
# define THREAD_RET_TYPE void __cdecl
# define THREAD_RET_CAST(p) ((void)(thr->i.retv = (void *)(p)))
# endif
#else /* !USE_RTL_THREAD_API */
# define THREAD_RET_TYPE DWORD WINAPI
# define THREAD_RET_CAST(p) ((DWORD)(p))
#endif /* !USE_RTL_THREAD_API */
typedef THREAD_RET_TYPE thread_func_t(void *);
START_EXTERN_C
#if defined(PERLDLL) && defined(USE_DECLSPEC_THREAD) && (!defined(__BORLANDC__) || defined(_DLL))
extern __declspec(thread) void *PL_current_context;
#define PERL_SET_CONTEXT(t) (PL_current_context = t)
#define PERL_GET_CONTEXT PL_current_context
#else
#define PERL_GET_CONTEXT Perl_get_context()
#define PERL_SET_CONTEXT(t) Perl_set_context(t)
#endif
#if defined(USE_THREADS)
struct perl_thread;
int Perl_thread_create (struct perl_thread *thr, thread_func_t *fn);
void Perl_set_thread_self (struct perl_thread *thr);
void Perl_init_thread_intern (struct perl_thread *t);
#define SET_THREAD_SELF(thr) Perl_set_thread_self(thr)
#endif /* USE_THREADS */
END_EXTERN_C
#define INIT_THREADS NOOP
#define ALLOC_THREAD_KEY \
STMT_START { \
if ((PL_thr_key = TlsAlloc()) == TLS_OUT_OF_INDEXES) { \
fprintf(stderr,"panic: TlsAlloc"); \
exit(1); \
} \
} STMT_END
#define FREE_THREAD_KEY \
STMT_START { \
TlsFree(PL_thr_key); \
} STMT_END
#if defined(USE_RTL_THREAD_API) && !defined(_MSC_VER)
#define JOIN(t, avp) \
STMT_START { \
if ((WaitForSingleObject((t)->self,INFINITE) == WAIT_FAILED) \
|| (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0) \
|| (CloseHandle((t)->self) == 0)) \
Perl_croak_nocontext("panic: JOIN"); \
*avp = (AV *)((t)->i.retv); \
} STMT_END
#else /* !USE_RTL_THREAD_API || _MSC_VER */
#define JOIN(t, avp) \
STMT_START { \
if ((WaitForSingleObject((t)->self,INFINITE) == WAIT_FAILED) \
|| (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0) \
|| (CloseHandle((t)->self) == 0)) \
Perl_croak_nocontext("panic: JOIN"); \
} STMT_END
#endif /* !USE_RTL_THREAD_API || _MSC_VER */
#define YIELD Sleep(0)
#endif /* _WIN32THREAD_H */
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