libjava/include/no-threads.h

   1 // -*- c++ -*-
   2 // no-threads.h - Defines for using no threads.
   3
   4 /* Copyright (C) 1998, 1999  Cygnus Solutions
   5
   6    This file is part of libgcj.
   7
   8 This software is copyrighted work licensed under the terms of the
   9 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
  10 details.  */
  11
  12 #ifndef __JV_NO_THREADS__
  13 #define __JV_NO_THREADS__
  14
  15 #include "config.h"
  16
  17 #include <stdlib.h>
  18 #ifdef HAVE_UNISTD_H
  19 #include <unistd.h>
  20 #endif
  21
  22 //
  23 // Typedefs.
  24 //
  25
  26 typedef int _Jv_ConditionVariable_t;
  27 typedef int _Jv_Mutex_t;
  28 typedef int _Jv_Thread_t;
  29 typedef void _Jv_ThreadStartFunc (java::lang::Thread *);
  30
  31
  32 //
  33 // Condition variables.
  34 //
  35
  36 inline void
  37 _Jv_CondInit (_Jv_ConditionVariable_t *)
  38 {
  39 }
  40
  41 // Waiting is ok provided there is a timeout.  Otherwise we will just
  42 // wait forever.
  43 inline int
  44 _Jv_CondWait (_Jv_ConditionVariable_t *, _Jv_Mutex_t *,
  45               jlong millis, jint nanos)
  46 {
  47   if (millis == 0 && nanos == 0)
  48     JvFail ("_Jv_CondWait without timeout");
  49
  50 #ifdef HAVE_SLEEP
  51   int seconds = millis / 1000;
  52   if (seconds > 0)
  53     sleep (seconds);
  54 #endif
  55
  56   return 0;
  57 }
  58
  59 inline int
  60 _Jv_CondNotify (_Jv_ConditionVariable_t *, _Jv_Mutex_t *)
  61 {
  62   // It is ok to notify -- it just has no effect.
  63   return 0;
  64 }
  65
  66 inline int
  67 _Jv_CondNotifyAll (_Jv_ConditionVariable_t *, _Jv_Mutex_t *)
  68 {
  69   // It is ok to notify -- it just has no effect.
  70   return 0;
  71 }
  72
  73
  74 //
  75 // Mutexes.
  76 //
  77
  78 inline void
  79 _Jv_MutexInit (_Jv_Mutex_t *)
  80 {
  81 }
  82
  83 inline int
  84 _Jv_MutexLock (_Jv_Mutex_t *)
  85 {
  86   return 0;
  87 }
  88
  89 inline int
  90 _Jv_MutexUnlock (_Jv_Mutex_t *)
  91 {
  92   return 0;
  93 }
  94
  95
  96 //
  97 // Thread creation and manipulation.
  98 //
  99
 100 inline void
 101 _Jv_InitThreads (void)
 102 {
 103 }
 104
 105 inline void
 106 _Jv_ThreadInitData (_Jv_Thread_t **data, java::lang::Thread *)
 107 {
 108   *data = NULL;
 109 }
 110
 111 inline java::lang::Thread *
 112 _Jv_ThreadCurrent (void)
 113 {
 114   extern java::lang::Thread *_Jv_OnlyThread;
 115   return _Jv_OnlyThread;
 116 }
 117
 118 inline void
 119 _Jv_ThreadYield (void)
 120 {
 121 }
 122
 123 inline void
 124 _Jv_ThreadSetPriority (_Jv_Thread_t *, jint)
 125 {
 126 }
 127
 128 void _Jv_ThreadStart (java::lang::Thread *, _Jv_Thread_t *,
 129                       _Jv_ThreadStartFunc *meth);
 130
 131 inline void
 132 _Jv_ThreadWait (void)
 133 {
 134 }
 135
 136 inline void
 137 _Jv_ThreadInterrupt (_Jv_Thread_t *)
 138 {
 139 }
 140
 141 #endif /* __JV_NO_THREADS__ */