Guido van Rossum | 6233293 | 1995-04-10 11:36:14 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 2 | Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| 3 | The Netherlands. |
| 4 | |
| 5 | All Rights Reserved |
| 6 | |
| 7 | Permission to use, copy, modify, and distribute this software and its |
| 8 | documentation for any purpose and without fee is hereby granted, |
| 9 | provided that the above copyright notice appear in all copies and that |
| 10 | both that copyright notice and this permission notice appear in |
| 11 | supporting documentation, and that the names of Stichting Mathematisch |
| 12 | Centrum or CWI or Corporation for National Research Initiatives or |
| 13 | CNRI not be used in advertising or publicity pertaining to |
| 14 | distribution of the software without specific, written prior |
| 15 | permission. |
| 16 | |
| 17 | While CWI is the initial source for this software, a modified version |
| 18 | is made available by the Corporation for National Research Initiatives |
| 19 | (CNRI) at the Internet address ftp://ftp.python.org. |
| 20 | |
| 21 | STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH |
| 22 | REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF |
| 23 | MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH |
| 24 | CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL |
| 25 | DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 26 | PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 27 | TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 28 | PERFORMANCE OF THIS SOFTWARE. |
Guido van Rossum | 6233293 | 1995-04-10 11:36:14 +0000 | [diff] [blame] | 29 | |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 30 | ******************************************************************/ |
Guido van Rossum | 6233293 | 1995-04-10 11:36:14 +0000 | [diff] [blame] | 31 | |
| 32 | /* This code implemented by cvale@netcom.com */ |
| 33 | |
| 34 | #define INCL_DOSPROCESS |
| 35 | #define INCL_DOSSEMAPHORES |
| 36 | #include "os2.h" |
| 37 | #include "limits.h" |
| 38 | |
| 39 | #include "process.h" |
| 40 | |
| 41 | long get_thread_ident(void); |
| 42 | |
| 43 | |
| 44 | /* |
| 45 | * Initialization of the C package, should not be needed. |
| 46 | */ |
| 47 | static void _init_thread(void) |
| 48 | { |
| 49 | } |
| 50 | |
| 51 | /* |
| 52 | * Thread support. |
| 53 | */ |
| 54 | int start_new_thread(void (*func)(void *), void *arg) |
| 55 | { |
| 56 | int aThread; |
| 57 | int success = 1; |
| 58 | |
Guido van Rossum | 8e9ebfd | 1997-11-22 21:53:48 +0000 | [diff] [blame] | 59 | aThread = _beginthread(func,NULL,65536,arg); |
Guido van Rossum | 6233293 | 1995-04-10 11:36:14 +0000 | [diff] [blame] | 60 | |
| 61 | if( aThread == -1 ) { |
| 62 | success = 0; |
| 63 | fprintf(stderr,"aThread failed == %d",aThread); |
| 64 | dprintf(("_beginthread failed. return %ld\n", errno)); |
| 65 | } |
| 66 | |
| 67 | return success; |
| 68 | } |
| 69 | |
| 70 | long get_thread_ident(void) |
| 71 | { |
| 72 | PPIB pib; |
| 73 | PTIB tib; |
| 74 | |
| 75 | if (!initialized) |
| 76 | init_thread(); |
| 77 | |
| 78 | DosGetInfoBlocks(&tib,&pib); |
| 79 | return tib->tib_ptib2->tib2_ultid; |
| 80 | } |
| 81 | |
| 82 | static void do_exit_thread(int no_cleanup) |
| 83 | { |
| 84 | dprintf(("%ld: exit_thread called\n", get_thread_ident())); |
| 85 | if (!initialized) |
| 86 | if (no_cleanup) |
| 87 | _exit(0); |
| 88 | else |
| 89 | exit(0); |
| 90 | _endthread(); |
| 91 | } |
| 92 | |
| 93 | void exit_thread(void) |
| 94 | { |
| 95 | do_exit_thread(0); |
| 96 | } |
| 97 | |
| 98 | void _exit_thread(void) |
| 99 | { |
| 100 | do_exit_thread(1); |
| 101 | } |
| 102 | |
| 103 | #ifndef NO_EXIT_PROG |
| 104 | static void do_exit_prog(int status, int no_cleanup) |
| 105 | { |
| 106 | dprintf(("exit_prog(%d) called\n", status)); |
| 107 | if (!initialized) |
| 108 | if (no_cleanup) |
| 109 | _exit(status); |
| 110 | else |
| 111 | exit(status); |
| 112 | } |
| 113 | |
| 114 | void exit_prog(int status) |
| 115 | { |
| 116 | do_exit_prog(status, 0); |
| 117 | } |
| 118 | |
| 119 | void _exit_prog _P1(int status) |
| 120 | { |
| 121 | do_exit_prog(status, 1); |
| 122 | } |
| 123 | #endif /* NO_EXIT_PROG */ |
| 124 | |
| 125 | /* |
| 126 | * Lock support. It has too be implemented as semaphores. |
| 127 | * I [Dag] tried to implement it with mutex but I could find a way to |
| 128 | * tell whether a thread already own the lock or not. |
| 129 | */ |
| 130 | type_lock allocate_lock(void) |
| 131 | { |
| 132 | HMTX aLock; |
| 133 | APIRET rc; |
| 134 | |
| 135 | dprintf(("allocate_lock called\n")); |
| 136 | if (!initialized) |
| 137 | init_thread(); |
| 138 | |
| 139 | DosCreateMutexSem(NULL, /* Sem name */ |
| 140 | &aLock, /* the semaphone */ |
| 141 | 0, /* shared ? */ |
| 142 | 0); /* initial state */ |
| 143 | |
| 144 | dprintf(("%ld: allocate_lock() -> %lx\n", get_thread_ident(), (long)aLock)); |
| 145 | |
| 146 | return (type_lock) aLock; |
| 147 | } |
| 148 | |
| 149 | void free_lock(type_lock aLock) |
| 150 | { |
| 151 | dprintf(("%ld: free_lock(%lx) called\n", get_thread_ident(),(long)aLock)); |
| 152 | |
| 153 | DosCloseMutexSem((HMTX)aLock); |
| 154 | } |
| 155 | |
| 156 | /* |
| 157 | * Return 1 on success if the lock was acquired |
| 158 | * |
| 159 | * and 0 if the lock was not acquired. This means a 0 is returned |
| 160 | * if the lock has already been acquired by this thread! |
| 161 | */ |
| 162 | int acquire_lock(type_lock aLock, int waitflag) |
| 163 | { |
| 164 | int success = 1; |
| 165 | ULONG rc, count; |
| 166 | PID pid = 0; |
| 167 | TID tid = 0; |
| 168 | |
| 169 | dprintf(("%ld: acquire_lock(%lx, %d) called\n", get_thread_ident(), |
| 170 | (long)aLock, waitflag)); |
| 171 | |
| 172 | DosQueryMutexSem((HMTX)aLock,&pid,&tid,&count); |
| 173 | if( tid == get_thread_ident() ) { /* if we own this lock */ |
| 174 | success = 0; |
| 175 | } else { |
| 176 | rc = DosRequestMutexSem((HMTX) aLock, |
| 177 | (waitflag == 1 ? SEM_INDEFINITE_WAIT : 0)); |
| 178 | |
| 179 | if( rc != 0) { |
| 180 | success = 0; /* We failed */ |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | dprintf(("%ld: acquire_lock(%lx, %d) -> %d\n", |
| 185 | get_thread_ident(),(long)aLock, waitflag, success)); |
| 186 | |
| 187 | return success; |
| 188 | } |
| 189 | |
| 190 | void release_lock(type_lock aLock) |
| 191 | { |
| 192 | dprintf(("%ld: release_lock(%lx) called\n", get_thread_ident(),(long)aLock)); |
| 193 | |
| 194 | if ( DosReleaseMutexSem( (HMTX) aLock ) != 0 ) { |
| 195 | dprintf(("%ld: Could not release_lock(%lx) error: %l\n", |
| 196 | get_thread_ident(), (long)aLock, GetLastError())); |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Semaphore support. |
| 202 | */ |
| 203 | type_sema allocate_sema(int value) |
| 204 | { |
| 205 | return (type_sema) 0; |
| 206 | } |
| 207 | |
| 208 | void free_sema(type_sema aSemaphore) |
| 209 | { |
| 210 | |
| 211 | } |
| 212 | |
Guido van Rossum | 8e9ebfd | 1997-11-22 21:53:48 +0000 | [diff] [blame] | 213 | int down_sema(type_sema aSemaphore, int waitflag) |
Guido van Rossum | 6233293 | 1995-04-10 11:36:14 +0000 | [diff] [blame] | 214 | { |
Guido van Rossum | cf1474b | 1996-10-08 14:17:53 +0000 | [diff] [blame] | 215 | return -1; |
Guido van Rossum | 6233293 | 1995-04-10 11:36:14 +0000 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | void up_sema(type_sema aSemaphore) |
| 219 | { |
| 220 | dprintf(("%ld: up_sema(%lx)\n", get_thread_ident(), (long)aSemaphore)); |
| 221 | } |