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 #include <stdio.h>
  46
  47 #ifdef HAVE_STDLIB_H
  48 #include <stdlib.h>
  49 #else
  50 extern char *getenv();
  51 #endif
  52
  53 #ifdef HAVE_UNISTD_H
  54 #include <unistd.h>
  55 #endif
  56
  57 #ifdef __DGUX
  58 #define _USING_POSIX4A_DRAFT6
  59 #endif
  60
  61 #ifdef __sgi
  62 #ifndef HAVE_PTHREAD_H /* XXX Need to check in configure.in */
  63 #undef _POSIX_THREADS
  64 #endif
  65 #endif
  66
  67 #include "pythread.h"
  68
  69 #ifdef __ksr__
  70 #define _POSIX_THREADS
  71 #endif
  72
  73 #ifndef _POSIX_THREADS
  74
  75 #ifdef __sgi
  76 #define SGI_THREADS
  77 #endif
  78
  79 #ifdef HAVE_THREAD_H
  80 #define SOLARIS_THREADS
  81 #endif
  82
  83 #if defined(sun) && !defined(SOLARIS_THREADS)
  84 #define SUN_LWP
  85 #endif
  86
  87 #endif /* _POSIX_THREADS */
  88
  89 #ifdef __STDC__
  90 #define _P(args)                args
  91 #define _P0()                   (void)
  92 #define _P1(v,t)                (t)
  93 #define _P2(v1,t1,v2,t2)        (t1,t2)
  94 #else
  95 #define _P(args)                ()
  96 #define _P0()                   ()
  97 #define _P1(v,t)                (v) t;
  98 #define _P2(v1,t1,v2,t2)        (v1,v2) t1; t2;
  99 #endif /* __STDC__ */
 100
 101 #ifdef Py_DEBUG
 102 static int thread_debug = 0;
 103 #define dprintf(args)   ((thread_debug & 1) && printf args)
 104 #define d2printf(args)  ((thread_debug & 8) && printf args)
 105 #else
 106 #define dprintf(args)
 107 #define d2printf(args)
 108 #endif
 109
 110 static int initialized;
 111
 112 static void PyThread__init_thread(); /* Forward */
 113
 114 void PyThread_init_thread _P0()
 115 {
 116 #ifdef Py_DEBUG
 117         char *p = getenv("THREADDEBUG");
 118
 119         if (p) {
 120                 if (*p)
 121                         thread_debug = atoi(p);
 122                 else
 123                         thread_debug = 1;
 124         }
 125 #endif /* Py_DEBUG */
 126         if (initialized)
 127                 return;
 128         initialized = 1;
 129         dprintf(("PyThread_init_thread called\n"));
 130         PyThread__init_thread();
 131 }
 132
 133 #ifdef SGI_THREADS
 134 #include "thread_sgi.h"
 135 #endif
 136
 137 #ifdef SOLARIS_THREADS
 138 #include "thread_solaris.h"
 139 #endif
 140
 141 #ifdef SUN_LWP
 142 #include "thread_lwp.h"
 143 #endif
 144
 145 #ifdef _POSIX_THREADS
 146 #include "thread_pthread.h"
 147 #endif
 148
 149 #ifdef C_THREADS
 150 #include "thread_cthread.h"
 151 #endif
 152
 153 #ifdef NT_THREADS
 154 #include "thread_nt.h"
 155 #endif
 156
 157 #ifdef OS2_THREADS
 158 #include "thread_os2.h"
 159 #endif
 160
 161 #ifdef BEOS_THREADS
 162 #include "thread_beos.h"
 163 #endif
 164
 165 /*
 166 #ifdef FOOBAR_THREADS
 167 #include "thread_foobar.h"
 168 #endif
 169 */