Python/thread.c

   1 /***********************************************************
   2 Copyright (c) 2000, BeOpen.com.
   3 Copyright (c) 1995-2000, Corporation for National Research Initiatives.
   4 Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
   5 All rights reserved.
   6
   7 See the file "Misc/COPYRIGHT" for information on usage and
   8 redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
   9 ******************************************************************/
  10
  11 /* Thread package.
  12    This is intended to be usable independently from Python.
  13    The implementation for system foobar is in a file thread_foobar.h
  14    which is included by this file dependent on config settings.
  15    Stuff shared by all thread_*.h files is collected here. */
  16
  17 #include "config.h"
  18
  19 /* config.h may or may not define DL_IMPORT */
  20 #ifndef DL_IMPORT       /* declarations for DLL import/export */
  21 #define DL_IMPORT(RTYPE) RTYPE
  22 #endif
  23
  24 #ifndef DONT_HAVE_STDIO_H
  25 #include <stdio.h>
  26 #endif
  27
  28 #ifdef HAVE_STDLIB_H
  29 #include <stdlib.h>
  30 #else
  31 #ifdef Py_DEBUG
  32 extern char *getenv(const char *);
  33 #endif
  34 #endif
  35
  36 #ifdef HAVE_UNISTD_H
  37 #include <unistd.h>
  38 #endif
  39
  40 #ifdef __DGUX
  41 #define _USING_POSIX4A_DRAFT6
  42 #endif
  43
  44 #ifdef __sgi
  45 #ifndef HAVE_PTHREAD_H /* XXX Need to check in configure.in */
  46 #undef _POSIX_THREADS
  47 #endif
  48 #endif
  49
  50 #include "pythread.h"
  51
  52 #ifdef __ksr__
  53 #define _POSIX_THREADS
  54 #endif
  55
  56 #ifndef _POSIX_THREADS
  57
  58 #ifdef __sgi
  59 #define SGI_THREADS
  60 #endif
  61
  62 #ifdef HAVE_THREAD_H
  63 #define SOLARIS_THREADS
  64 #endif
  65
  66 #if defined(sun) && !defined(SOLARIS_THREADS)
  67 #define SUN_LWP
  68 #endif
  69
  70 #ifdef __MWERKS__
  71 #define _POSIX_THREADS
  72 #endif
  73
  74 #endif /* _POSIX_THREADS */
  75
  76
  77 #ifdef Py_DEBUG
  78 static int thread_debug = 0;
  79 #define dprintf(args)   ((thread_debug & 1) && printf args)
  80 #define d2printf(args)  ((thread_debug & 8) && printf args)
  81 #else
  82 #define dprintf(args)
  83 #define d2printf(args)
  84 #endif
  85
  86 static int initialized;
  87
  88 static void PyThread__init_thread(void); /* Forward */
  89
  90 void PyThread_init_thread(void)
  91 {
  92 #ifdef Py_DEBUG
  93         char *p = getenv("THREADDEBUG");
  94
  95         if (p) {
  96                 if (*p)
  97                         thread_debug = atoi(p);
  98                 else
  99                         thread_debug = 1;
 100         }
 101 #endif /* Py_DEBUG */
 102         if (initialized)
 103                 return;
 104         initialized = 1;
 105         dprintf(("PyThread_init_thread called\n"));
 106         PyThread__init_thread();
 107 }
 108
 109 #ifdef SGI_THREADS
 110 #include "thread_sgi.h"
 111 #endif
 112
 113 #ifdef SOLARIS_THREADS
 114 #include "thread_solaris.h"
 115 #endif
 116
 117 #ifdef SUN_LWP
 118 #include "thread_lwp.h"
 119 #endif
 120
 121 #ifdef _GNU_PTH
 122 #include "thread_pth.h"
 123 #else
 124 #ifdef _POSIX_THREADS
 125 #include "thread_pthread.h"
 126 #endif
 127 #endif
 128
 129 #ifdef C_THREADS
 130 #include "thread_cthread.h"
 131 #endif
 132
 133 #ifdef NT_THREADS
 134 #include "thread_nt.h"
 135 #endif
 136
 137 #ifdef OS2_THREADS
 138 #include "thread_os2.h"
 139 #endif
 140
 141 #ifdef BEOS_THREADS
 142 #include "thread_beos.h"
 143 #endif
 144
 145 #ifdef WINCE_THREADS
 146 #include "thread_wince.h"
 147 #endif
 148
 149 /*
 150 #ifdef FOOBAR_THREADS
 151 #include "thread_foobar.h"
 152 #endif
 153 */