Python/thread.c

   1 /***********************************************************
   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.
  29
  30 ******************************************************************/
  31
  32 /* Thread package.
  33    This is intended to be usable independently from Python.
  34    The implementation for system foobar is in a file thread_foobar.h
  35    which is included by this file dependent on config settings.
  36    Stuff shared by all thread_*.h files is collected here. */
  37
  38 #include "config.h"
  39
  40 /* config.h may or may not define DL_IMPORT */
  41 #ifndef DL_IMPORT       /* declarations for DLL import/export */
  42 #define DL_IMPORT(RTYPE) RTYPE
  43 #endif
  44
  45 #ifndef DONT_HAVE_STDIO_H
  46 #include <stdio.h>
  47 #endif
  48
  49 #ifdef HAVE_STDLIB_H
  50 #include <stdlib.h>
  51 #else
  52 #ifdef Py_DEBUG
  53 extern char *getenv();
  54 #endif
  55 #endif
  56
  57 #ifdef HAVE_UNISTD_H
  58 #include <unistd.h>
  59 #endif
  60
  61 #ifdef __DGUX
  62 #define _USING_POSIX4A_DRAFT6
  63 #endif
  64
  65 #ifdef __sgi
  66 #ifndef HAVE_PTHREAD_H /* XXX Need to check in configure.in */
  67 #undef _POSIX_THREADS
  68 #endif
  69 #endif
  70
  71 #include "pythread.h"
  72
  73 #ifdef __ksr__
  74 #define _POSIX_THREADS
  75 #endif
  76
  77 #ifndef _POSIX_THREADS
  78
  79 #ifdef __sgi
  80 #define SGI_THREADS
  81 #endif
  82
  83 #ifdef HAVE_THREAD_H
  84 #define SOLARIS_THREADS
  85 #endif
  86
  87 #if defined(sun) && !defined(SOLARIS_THREADS)
  88 #define SUN_LWP
  89 #endif
  90
  91 #endif /* _POSIX_THREADS */
  92
  93 #ifdef __STDC__
  94 #define _P(args)                args
  95 #define _P0()                   (void)
  96 #define _P1(v,t)                (t)
  97 #define _P2(v1,t1,v2,t2)        (t1,t2)
  98 #else
  99 #define _P(args)                ()
 100 #define _P0()                   ()
 101 #define _P1(v,t)                (v) t;
 102 #define _P2(v1,t1,v2,t2)        (v1,v2) t1; t2;
 103 #endif /* __STDC__ */
 104
 105 #ifdef Py_DEBUG
 106 static int thread_debug = 0;
 107 #define dprintf(args)   ((thread_debug & 1) && printf args)
 108 #define d2printf(args)  ((thread_debug & 8) && printf args)
 109 #else
 110 #define dprintf(args)
 111 #define d2printf(args)
 112 #endif
 113
 114 static int initialized;
 115
 116 static void PyThread__init_thread(); /* Forward */
 117
 118 void PyThread_init_thread _P0()
 119 {
 120 #ifdef Py_DEBUG
 121         char *p = getenv("THREADDEBUG");
 122
 123         if (p) {
 124                 if (*p)
 125                         thread_debug = atoi(p);
 126                 else
 127                         thread_debug = 1;
 128         }
 129 #endif /* Py_DEBUG */
 130         if (initialized)
 131                 return;
 132         initialized = 1;
 133         dprintf(("PyThread_init_thread called\n"));
 134         PyThread__init_thread();
 135 }
 136
 137 #ifdef SGI_THREADS
 138 #include "thread_sgi.h"
 139 #endif
 140
 141 #ifdef SOLARIS_THREADS
 142 #include "thread_solaris.h"
 143 #endif
 144
 145 #ifdef SUN_LWP
 146 #include "thread_lwp.h"
 147 #endif
 148
 149 #ifdef _POSIX_THREADS
 150 #include "thread_pthread.h"
 151 #endif
 152
 153 #ifdef C_THREADS
 154 #include "thread_cthread.h"
 155 #endif
 156
 157 #ifdef NT_THREADS
 158 #include "thread_nt.h"
 159 #endif
 160
 161 #ifdef OS2_THREADS
 162 #include "thread_os2.h"
 163 #endif
 164
 165 #ifdef BEOS_THREADS
 166 #include "thread_beos.h"
 167 #endif
 168
 169 #ifdef WINCE_THREADS
 170 #include "thread_wince.h"
 171 #endif
 172
 173 /*
 174 #ifdef FOOBAR_THREADS
 175 #include "thread_foobar.h"
 176 #endif
 177 */