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[win32] Fix $ENV{Path} in FindBin.pm
[perl5.git] / win32 / win32thread.h
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1#ifndef _WIN32THREAD_H
2#define _WIN32THREAD_H
3typedef struct win32_cond { LONG waiters; HANDLE sem; } perl_cond;
ea0efc06 4typedef DWORD perl_key;
51dd5992 5typedef HANDLE perl_os_thread;
ea0efc06 6
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7#ifndef DONT_USE_CRITICAL_SECTION
8
9/* Critical Sections used instead of mutexes: lightweight,
ea0efc06 10 * but can't be communicated to child processes, and can't get
4b026b9e 11 * HANDLE to it for use elsewhere.
ea0efc06 12 */
d55594ae 13typedef CRITICAL_SECTION perl_mutex;
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14#define MUTEX_INIT(m) InitializeCriticalSection(m)
15#define MUTEX_LOCK(m) EnterCriticalSection(m)
16#define MUTEX_UNLOCK(m) LeaveCriticalSection(m)
17#define MUTEX_DESTROY(m) DeleteCriticalSection(m)
4b026b9e 18
d55594ae 19#else
ea0efc06 20
4b026b9e 21typedef HANDLE perl_mutex;
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22#define MUTEX_INIT(m) \
23 STMT_START { \
24 if ((*(m) = CreateMutex(NULL,FALSE,NULL)) == NULL) \
25 croak("panic: MUTEX_INIT"); \
26 } STMT_END
27#define MUTEX_LOCK(m) \
28 STMT_START { \
29 if (WaitForSingleObject(*(m),INFINITE) == WAIT_FAILED) \
30 croak("panic: MUTEX_LOCK"); \
31 } STMT_END
32#define MUTEX_UNLOCK(m) \
33 STMT_START { \
34 if (ReleaseMutex(*(m)) == 0) \
35 croak("panic: MUTEX_UNLOCK"); \
36 } STMT_END
37#define MUTEX_DESTROY(m) \
38 STMT_START { \
39 if (CloseHandle(*(m)) == 0) \
40 croak("panic: MUTEX_DESTROY"); \
41 } STMT_END
42
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43#endif
44
45/* These macros assume that the mutex associated with the condition
46 * will always be held before COND_{SIGNAL,BROADCAST,WAIT,DESTROY},
47 * so there's no separate mutex protecting access to (c)->waiters
48 */
ea0efc06 49#define COND_INIT(c) \
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50 STMT_START { \
51 (c)->waiters = 0; \
52 (c)->sem = CreateSemaphore(NULL,0,LONG_MAX,NULL); \
53 if ((c)->sem == NULL) \
54 croak("panic: COND_INIT (%ld)",GetLastError()); \
ea0efc06 55 } STMT_END
d55594ae 56
ea0efc06 57#define COND_SIGNAL(c) \
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58 STMT_START { \
59 if ((c)->waiters > 0 && \
60 ReleaseSemaphore((c)->sem,1,NULL) == 0) \
61 croak("panic: COND_SIGNAL (%ld)",GetLastError()); \
ea0efc06 62 } STMT_END
d55594ae 63
ea0efc06 64#define COND_BROADCAST(c) \
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65 STMT_START { \
66 if ((c)->waiters > 0 && \
67 ReleaseSemaphore((c)->sem,(c)->waiters,NULL) == 0) \
68 croak("panic: COND_BROADCAST (%ld)",GetLastError());\
ea0efc06 69 } STMT_END
d55594ae 70
ea0efc06 71#define COND_WAIT(c, m) \
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72 STMT_START { \
73 (c)->waiters++; \
74 MUTEX_UNLOCK(m); \
75 /* Note that there's no race here, since a \
76 * COND_BROADCAST() on another thread will have seen the\
77 * right number of waiters (i.e. including this one) */ \
78 if (WaitForSingleObject((c)->sem,INFINITE)==WAIT_FAILED)\
79 croak("panic: COND_WAIT (%ld)",GetLastError()); \
80 /* XXX there may be an inconsequential race here */ \
81 MUTEX_LOCK(m); \
82 (c)->waiters--; \
ea0efc06 83 } STMT_END
d55594ae 84
ea0efc06 85#define COND_DESTROY(c) \
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86 STMT_START { \
87 (c)->waiters = 0; \
88 if (CloseHandle((c)->sem) == 0) \
89 croak("panic: COND_DESTROY (%ld)",GetLastError()); \
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90 } STMT_END
91
92#define DETACH(t) \
93 STMT_START { \
46930d8f 94 if (CloseHandle((t)->self) == 0) { \
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95 MUTEX_UNLOCK(&(t)->mutex); \
96 croak("panic: DETACH"); \
97 } \
98 } STMT_END
99
9811a7d7 100
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101#define THREAD_CREATE(t, f) Perl_thread_create(t, f)
102#define THREAD_POST_CREATE(t) NOOP
103#define THREAD_RET_TYPE DWORD WINAPI
104#define THREAD_RET_CAST(p) ((DWORD)(p))
ea0efc06 105
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106typedef THREAD_RET_TYPE thread_func_t(void *);
107
0fefa03b 108
d55594ae 109START_EXTERN_C
0fefa03b 110
c69f112c 111#if defined(PERLDLL) && defined(USE_DECLSPEC_THREAD) && (!defined(__BORLANDC__) || defined(_DLL))
0372dfcf 112extern __declspec(thread) struct perl_thread *Perl_current_thread;
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113#define SET_THR(t) (Perl_current_thread = t)
114#define THR Perl_current_thread
115#else
116#define THR Perl_getTHR()
117#define SET_THR(t) Perl_setTHR(t)
118#endif
c69f112c 119struct perl_thread;
0fefa03b 120
d55594ae 121void Perl_alloc_thread_key _((void));
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122int Perl_thread_create _((struct perl_thread *thr, thread_func_t *fn));
123void Perl_set_thread_self _((struct perl_thread *thr));
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124struct perl_thread *Perl_getTHR _((void));
125void Perl_setTHR _((struct perl_thread *t));
c53bd28a 126void Perl_init_thread_intern _((struct perl_thread *t));
0fefa03b 127
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128END_EXTERN_C
129
130#define INIT_THREADS NOOP
c69f112c 131#define ALLOC_THREAD_KEY Perl_alloc_thread_key()
235db74f 132#define SET_THREAD_SELF(thr) Perl_set_thread_self(thr)
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133
134#define JOIN(t, avp) \
135 STMT_START { \
46930d8f 136 if ((WaitForSingleObject((t)->self,INFINITE) == WAIT_FAILED) \
4b026b9e 137 || (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0)) \
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138 croak("panic: JOIN"); \
139 } STMT_END
140
ea0efc06 141#define YIELD Sleep(0)
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142
143#endif /* _WIN32THREAD_H */
0fefa03b 144