Mercurial > cpython-lru_cache-weakref
annotate Python/thread_os2.h @ 15255:2fa4e35083e0 legacy-trunk v2.0
This commit was manufactured by cvs2svn to create tag 'release20'.
| author | cvs2svn <tools@python.org> |
|---|---|
| date | Mon, 16 Oct 2000 20:51:33 +0000 |
| parents | 6f6f965c5e2d |
| children | ebfd87e87884 |
| rev | line source |
|---|---|
| 2649 | 1 /* This code implemented by cvale@netcom.com */ |
| 2 | |
| 3 #define INCL_DOSPROCESS | |
| 4 #define INCL_DOSSEMAPHORES | |
| 5 #include "os2.h" | |
| 6 #include "limits.h" | |
| 7 | |
| 8 #include "process.h" | |
| 9 | |
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10 long PyThread_get_thread_ident(void); |
| 2649 | 11 |
| 12 | |
| 13 /* | |
| 14 * Initialization of the C package, should not be needed. | |
| 15 */ | |
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16 static void |
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17 PyThread__init_thread(void) |
| 2649 | 18 { |
| 19 } | |
| 20 | |
| 21 /* | |
| 22 * Thread support. | |
| 23 */ | |
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24 int |
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25 PyThread_start_new_thread(void (*func)(void *), void *arg) |
| 2649 | 26 { |
| 27 int aThread; | |
| 28 int success = 1; | |
| 29 | |
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30 aThread = _beginthread(func,NULL,65536,arg); |
| 2649 | 31 |
| 32 if( aThread == -1 ) { | |
| 33 success = 0; | |
| 34 fprintf(stderr,"aThread failed == %d",aThread); | |
| 35 dprintf(("_beginthread failed. return %ld\n", errno)); | |
| 36 } | |
| 37 | |
| 38 return success; | |
| 39 } | |
| 40 | |
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41 long |
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42 PyThread_get_thread_ident(void) |
| 2649 | 43 { |
| 44 PPIB pib; | |
| 45 PTIB tib; | |
| 46 | |
| 47 if (!initialized) | |
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48 PyThread_init_thread(); |
| 2649 | 49 |
| 50 DosGetInfoBlocks(&tib,&pib); | |
| 51 return tib->tib_ptib2->tib2_ultid; | |
| 52 } | |
| 53 | |
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54 static void |
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55 do_PyThread_exit_thread(int no_cleanup) |
| 2649 | 56 { |
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57 dprintf(("%ld: PyThread_exit_thread called\n", PyThread_get_thread_ident())); |
| 2649 | 58 if (!initialized) |
| 59 if (no_cleanup) | |
| 60 _exit(0); | |
| 61 else | |
| 62 exit(0); | |
| 63 _endthread(); | |
| 64 } | |
| 65 | |
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66 void |
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67 PyThread_exit_thread(void) |
| 2649 | 68 { |
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69 do_PyThread_exit_thread(0); |
| 2649 | 70 } |
| 71 | |
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72 void |
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73 PyThread__exit_thread(void) |
| 2649 | 74 { |
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75 do_PyThread_exit_thread(1); |
| 2649 | 76 } |
| 77 | |
| 78 #ifndef NO_EXIT_PROG | |
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79 static void |
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80 do_PyThread_exit_prog(int status, int no_cleanup) |
| 2649 | 81 { |
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82 dprintf(("PyThread_exit_prog(%d) called\n", status)); |
| 2649 | 83 if (!initialized) |
| 84 if (no_cleanup) | |
| 85 _exit(status); | |
| 86 else | |
| 87 exit(status); | |
| 88 } | |
| 89 | |
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90 void |
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91 PyThread_exit_prog(int status) |
| 2649 | 92 { |
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93 do_PyThread_exit_prog(status, 0); |
| 2649 | 94 } |
| 95 | |
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96 void |
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97 PyThread__exit_prog(int status) |
| 2649 | 98 { |
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99 do_PyThread_exit_prog(status, 1); |
| 2649 | 100 } |
| 101 #endif /* NO_EXIT_PROG */ | |
| 102 | |
| 103 /* | |
| 104 * Lock support. It has too be implemented as semaphores. | |
| 105 * I [Dag] tried to implement it with mutex but I could find a way to | |
| 106 * tell whether a thread already own the lock or not. | |
| 107 */ | |
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108 PyThread_type_lock |
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109 PyThread_allocate_lock(void) |
| 2649 | 110 { |
| 111 HMTX aLock; | |
| 112 APIRET rc; | |
| 113 | |
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114 dprintf(("PyThread_allocate_lock called\n")); |
| 2649 | 115 if (!initialized) |
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116 PyThread_init_thread(); |
| 2649 | 117 |
| 118 DosCreateMutexSem(NULL, /* Sem name */ | |
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119 &aLock, /* the semaphore */ |
| 2649 | 120 0, /* shared ? */ |
| 121 0); /* initial state */ | |
| 122 | |
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123 dprintf(("%ld: PyThread_allocate_lock() -> %p\n", PyThread_get_thread_ident(), aLock)); |
| 2649 | 124 |
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125 return (PyThread_type_lock) aLock; |
| 2649 | 126 } |
| 127 | |
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128 void |
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129 PyThread_free_lock(PyThread_type_lock aLock) |
| 2649 | 130 { |
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131 dprintf(("%ld: PyThread_free_lock(%p) called\n", PyThread_get_thread_ident(),aLock)); |
| 2649 | 132 |
| 133 DosCloseMutexSem((HMTX)aLock); | |
| 134 } | |
| 135 | |
| 136 /* | |
| 137 * Return 1 on success if the lock was acquired | |
| 138 * | |
| 139 * and 0 if the lock was not acquired. This means a 0 is returned | |
| 140 * if the lock has already been acquired by this thread! | |
| 141 */ | |
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142 int |
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143 PyThread_acquire_lock(PyThread_type_lock aLock, int waitflag) |
| 2649 | 144 { |
| 145 int success = 1; | |
| 146 ULONG rc, count; | |
| 147 PID pid = 0; | |
| 148 TID tid = 0; | |
| 149 | |
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150 dprintf(("%ld: PyThread_acquire_lock(%p, %d) called\n", PyThread_get_thread_ident(), |
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151 aLock, waitflag)); |
| 2649 | 152 |
| 153 DosQueryMutexSem((HMTX)aLock,&pid,&tid,&count); | |
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154 if( tid == PyThread_get_thread_ident() ) { /* if we own this lock */ |
| 2649 | 155 success = 0; |
| 156 } else { | |
| 157 rc = DosRequestMutexSem((HMTX) aLock, | |
| 158 (waitflag == 1 ? SEM_INDEFINITE_WAIT : 0)); | |
| 159 | |
| 160 if( rc != 0) { | |
| 161 success = 0; /* We failed */ | |
| 162 } | |
| 163 } | |
| 164 | |
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165 dprintf(("%ld: PyThread_acquire_lock(%p, %d) -> %d\n", |
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166 PyThread_get_thread_ident(),aLock, waitflag, success)); |
| 2649 | 167 |
| 168 return success; | |
| 169 } | |
| 170 | |
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171 void |
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172 PyThread_release_lock(PyThread_type_lock aLock) |
| 2649 | 173 { |
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174 dprintf(("%ld: PyThread_release_lock(%p) called\n", PyThread_get_thread_ident(),aLock)); |
| 2649 | 175 |
| 176 if ( DosReleaseMutexSem( (HMTX) aLock ) != 0 ) { | |
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177 dprintf(("%ld: Could not PyThread_release_lock(%p) error: %l\n", |
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178 PyThread_get_thread_ident(), aLock, GetLastError())); |
| 2649 | 179 } |
| 180 } | |
| 181 | |
| 182 /* | |
| 183 * Semaphore support. | |
| 184 */ | |
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185 PyThread_type_sema |
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186 PyThread_allocate_sema(int value) |
| 2649 | 187 { |
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188 return (PyThread_type_sema) 0; |
| 2649 | 189 } |
| 190 | |
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191 void |
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192 PyThread_free_sema(PyThread_type_sema aSemaphore) |
| 2649 | 193 { |
| 194 | |
| 195 } | |
| 196 | |
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197 int |
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198 PyThread_down_sema(PyThread_type_sema aSemaphore, int waitflag) |
| 2649 | 199 { |
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200 return -1; |
| 2649 | 201 } |
| 202 | |
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203 void |
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204 PyThread_up_sema(PyThread_type_sema aSemaphore) |
| 2649 | 205 { |
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206 dprintf(("%ld: PyThread_up_sema(%p)\n", PyThread_get_thread_ident(), aSemaphore)); |
| 2649 | 207 } |