src/third_party/npapi/npspy/extern/nspr/md/_nspr_pthread.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /*
   3  * The contents of this file are subject to the Mozilla Public
   4  * License Version 1.1 (the "License"); you may not use this file
   5  * except in compliance with the License. You may obtain a copy of
   6  * the License at http://www.mozilla.org/MPL/
   7  *
   8  * Software distributed under the License is distributed on an "AS
   9  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  10  * implied. See the License for the specific language governing
  11  * rights and limitations under the License.
  12  *
  13  * The Original Code is the Netscape Portable Runtime (NSPR).
  14  *
  15  * The Initial Developer of the Original Code is Netscape
  16  * Communications Corporation.  Portions created by Netscape are
  17  * Copyright (C) 1998-2000 Netscape Communications Corporation.  All
  18  * Rights Reserved.
  19  *
  20  * Contributor(s):
  21  *
  22  * Alternatively, the contents of this file may be used under the
  23  * terms of the GNU General Public License Version 2 or later (the
  24  * "GPL"), in which case the provisions of the GPL are applicable
  25  * instead of those above.  If you wish to allow use of your
  26  * version of this file only under the terms of the GPL and not to
  27  * allow others to use your version of this file under the MPL,
  28  * indicate your decision by deleting the provisions above and
  29  * replace them with the notice and other provisions required by
  30  * the GPL.  If you do not delete the provisions above, a recipient
  31  * may use your version of this file under either the MPL or the
  32  * GPL.
  33  */
  34
  35 #ifndef nspr_pthread_defs_h___
  36 #define nspr_pthread_defs_h___
  37
  38 #include <pthread.h>
  39 #include "prthread.h"
  40
  41 #if defined(PTHREADS_USER)
  42 /*
  43 ** Thread Local Storage
  44 */
  45 extern pthread_key_t current_thread_key;
  46 extern pthread_key_t current_cpu_key;
  47 extern pthread_key_t last_thread_key;
  48 extern pthread_key_t intsoff_key;
  49
  50 #define _MD_CURRENT_THREAD()                    \
  51                         ((struct PRThread *) pthread_getspecific(current_thread_key))
  52 #define _MD_CURRENT_CPU()                               \
  53                         ((struct _PRCPU *) pthread_getspecific(current_cpu_key))
  54 #define _MD_LAST_THREAD()                               \
  55                         ((struct PRThread *) pthread_getspecific(last_thread_key))
  56
  57 #define _MD_SET_CURRENT_THREAD(newval)                  \
  58         pthread_setspecific(current_thread_key, (void *)newval)
  59
  60 #define _MD_SET_CURRENT_CPU(newval)                     \
  61         pthread_setspecific(current_cpu_key, (void *)newval)
  62
  63 #define _MD_SET_LAST_THREAD(newval)                             \
  64         pthread_setspecific(last_thread_key, (void *)newval)
  65
  66 #define _MD_SET_INTSOFF(_val)
  67 #define _MD_GET_INTSOFF()       1
  68
  69 /*
  70 ** Initialize the thread context preparing it to execute _main.
  71 */
  72 #define _MD_INIT_CONTEXT(_thread, _sp, _main, status)                   \
  73     PR_BEGIN_MACRO                                                                                      \
  74         *status = PR_TRUE;                                                              \
  75                 if (SAVE_CONTEXT(_thread)) {                                                    \
  76                 (*_main)();                                                                                     \
  77                 }                                                                                                               \
  78                 _MD_SET_THR_SP(_thread, _sp);                                                   \
  79                 _thread->no_sched = 0;                                                                  \
  80     PR_END_MACRO
  81
  82 #define _MD_SWITCH_CONTEXT(_thread)                                                             \
  83     PR_BEGIN_MACRO                                                                                                      \
  84         PR_ASSERT(_thread->no_sched);                                                                   \
  85         if (!SAVE_CONTEXT(_thread)) {                                                                   \
  86                 (_thread)->md.errcode = errno;                                                          \
  87                 _MD_SET_LAST_THREAD(_thread);                                                           \
  88                 _PR_Schedule();                                                                                 \
  89     } else {                                                                                                            \
  90                  (_MD_LAST_THREAD())->no_sched = 0;                                                     \
  91         }                                                                                                                               \
  92     PR_END_MACRO
  93
  94 /*
  95 ** Restore a thread context, saved by _MD_SWITCH_CONTEXT
  96 */
  97 #define _MD_RESTORE_CONTEXT(_thread)                                                            \
  98     PR_BEGIN_MACRO                                                                                                      \
  99     errno = (_thread)->md.errcode;                                                                      \
 100     _MD_SET_CURRENT_THREAD(_thread);                                                            \
 101         _thread->no_sched = 1;                                                                                  \
 102     GOTO_CONTEXT(_thread);                                                                                      \
 103     PR_END_MACRO
 104
 105
 106 /* Machine-dependent (MD) data structures */
 107
 108 struct _MDThread {
 109     jmp_buf             jb;
 110     int                         id;
 111     int                         errcode;
 112         pthread_t               pthread;
 113         pthread_mutex_t pthread_mutex;
 114         pthread_cond_t  pthread_cond;
 115         int                             wait;
 116 };
 117
 118 struct _MDThreadStack {
 119     PRInt8 notused;
 120 };
 121
 122 struct _MDLock {
 123         pthread_mutex_t mutex;
 124 };
 125
 126 struct _MDSemaphore {
 127     PRInt8 notused;
 128 };
 129
 130 struct _MDCVar {
 131         pthread_mutex_t mutex;
 132 };
 133
 134 struct _MDSegment {
 135     PRInt8 notused;
 136 };
 137
 138 /*
 139  * md-specific cpu structure field
 140  */
 141 #define _PR_MD_MAX_OSFD FD_SETSIZE
 142
 143 struct _MDCPU_Unix {
 144     PRCList ioQ;
 145     PRUint32 ioq_timeout;
 146     PRInt32 ioq_max_osfd;
 147     PRInt32 ioq_osfd_cnt;
 148 #ifndef _PR_USE_POLL
 149     fd_set fd_read_set, fd_write_set, fd_exception_set;
 150     PRInt16 fd_read_cnt[_PR_MD_MAX_OSFD],fd_write_cnt[_PR_MD_MAX_OSFD],
 151                                 fd_exception_cnt[_PR_MD_MAX_OSFD];
 152 #else
 153         struct pollfd *ioq_pollfds;
 154         int ioq_pollfds_size;
 155 #endif  /* _PR_USE_POLL */
 156 };
 157
 158 #define _PR_IOQ(_cpu)                   ((_cpu)->md.md_unix.ioQ)
 159 #define _PR_ADD_TO_IOQ(_pq, _cpu) PR_APPEND_LINK(&_pq.links, &_PR_IOQ(_cpu))
 160 #define _PR_FD_READ_SET(_cpu)           ((_cpu)->md.md_unix.fd_read_set)
 161 #define _PR_FD_READ_CNT(_cpu)           ((_cpu)->md.md_unix.fd_read_cnt)
 162 #define _PR_FD_WRITE_SET(_cpu)          ((_cpu)->md.md_unix.fd_write_set)
 163 #define _PR_FD_WRITE_CNT(_cpu)          ((_cpu)->md.md_unix.fd_write_cnt)
 164 #define _PR_FD_EXCEPTION_SET(_cpu)      ((_cpu)->md.md_unix.fd_exception_set)
 165 #define _PR_FD_EXCEPTION_CNT(_cpu)      ((_cpu)->md.md_unix.fd_exception_cnt)
 166 #define _PR_IOQ_TIMEOUT(_cpu)           ((_cpu)->md.md_unix.ioq_timeout)
 167 #define _PR_IOQ_MAX_OSFD(_cpu)          ((_cpu)->md.md_unix.ioq_max_osfd)
 168 #define _PR_IOQ_OSFD_CNT(_cpu)          ((_cpu)->md.md_unix.ioq_osfd_cnt)
 169 #define _PR_IOQ_POLLFDS(_cpu)           ((_cpu)->md.md_unix.ioq_pollfds)
 170 #define _PR_IOQ_POLLFDS_SIZE(_cpu)      ((_cpu)->md.md_unix.ioq_pollfds_size)
 171
 172 #define _PR_IOQ_MIN_POLLFDS_SIZE(_cpu)  32
 173
 174 struct _MDCPU {
 175     jmp_buf                     jb;
 176         pthread_t                       pthread;
 177         struct _MDCPU_Unix      md_unix;
 178 };
 179
 180 /*
 181 #define _MD_NEW_LOCK(lock) PR_SUCCESS
 182 #define _MD_FREE_LOCK(lock)
 183 #define _MD_LOCK(lock)
 184 #define _MD_UNLOCK(lock)
 185 */
 186
 187 extern pthread_mutex_t _pr_heapLock;
 188
 189 #define _PR_LOCK(lock) pthread_mutex_lock(lock)
 190
 191 #define _PR_UNLOCK(lock) pthread_mutex_unlock(lock)
 192
 193
 194 #define _PR_LOCK_HEAP() {                                                                       \
 195                                 if (_pr_primordialCPU) {                                        \
 196                                         _PR_LOCK(_pr_heapLock);                                 \
 197                                 }
 198
 199 #define _PR_UNLOCK_HEAP()       if (_pr_primordialCPU)  {               \
 200                                         _PR_UNLOCK(_pr_heapLock);                               \
 201                                 }                                                                                       \
 202                           }
 203
 204 NSPR_API(PRStatus) _MD_NEW_LOCK(struct _MDLock *md);
 205 NSPR_API(void) _MD_FREE_LOCK(struct _MDLock *lockp);
 206
 207 #define _MD_LOCK(_lockp) _PR_LOCK(&(_lockp)->mutex)
 208 #define _MD_UNLOCK(_lockp) _PR_UNLOCK(&(_lockp)->mutex)
 209
 210 #define _MD_INIT_IO()
 211 #define _MD_IOQ_LOCK()
 212 #define _MD_IOQ_UNLOCK()
 213 #define _MD_CHECK_FOR_EXIT()
 214
 215 NSPR_API(PRStatus) _MD_InitThread(struct PRThread *thread);
 216 #define _MD_INIT_THREAD _MD_InitThread
 217 #define _MD_INIT_ATTACHED_THREAD _MD_InitThread
 218
 219 NSPR_API(void) _MD_ExitThread(struct PRThread *thread);
 220 #define _MD_EXIT_THREAD _MD_ExitThread
 221
 222 NSPR_API(void) _MD_SuspendThread(struct PRThread *thread);
 223 #define _MD_SUSPEND_THREAD _MD_SuspendThread
 224
 225 NSPR_API(void) _MD_ResumeThread(struct PRThread *thread);
 226 #define _MD_RESUME_THREAD _MD_ResumeThread
 227
 228 NSPR_API(void) _MD_SuspendCPU(struct _PRCPU *thread);
 229 #define _MD_SUSPEND_CPU _MD_SuspendCPU
 230
 231 NSPR_API(void) _MD_ResumeCPU(struct _PRCPU *thread);
 232 #define _MD_RESUME_CPU _MD_ResumeCPU
 233
 234 #define _MD_BEGIN_SUSPEND_ALL()
 235 #define _MD_END_SUSPEND_ALL()
 236 #define _MD_BEGIN_RESUME_ALL()
 237 #define _MD_END_RESUME_ALL()
 238
 239 NSPR_API(void) _MD_EarlyInit(void);
 240 #define _MD_EARLY_INIT _MD_EarlyInit
 241
 242 #define _MD_FINAL_INIT _PR_UnixInit
 243
 244 NSPR_API(void) _MD_InitLocks(void);
 245 #define _MD_INIT_LOCKS _MD_InitLocks
 246
 247 NSPR_API(void) _MD_CleanThread(struct PRThread *thread);
 248 #define _MD_CLEAN_THREAD _MD_CleanThread
 249
 250 NSPR_API(PRStatus) _MD_CreateThread(
 251                         struct PRThread *thread,
 252                         void (*start) (void *),
 253                         PRThreadPriority priority,
 254                         PRThreadScope scope,
 255                         PRThreadState state,
 256                         PRUint32 stackSize);
 257 #define _MD_CREATE_THREAD _MD_CreateThread
 258
 259 extern void _MD_CleanupBeforeExit(void);
 260 #define _MD_CLEANUP_BEFORE_EXIT _MD_CleanupBeforeExit
 261
 262 NSPR_API(void) _MD_InitRunningCPU(struct _PRCPU *cpu);
 263 #define    _MD_INIT_RUNNING_CPU _MD_InitRunningCPU
 264
 265 /* The _PR_MD_WAIT_LOCK and _PR_MD_WAKEUP_WAITER functions put to sleep and
 266  * awaken a thread which is waiting on a lock or cvar.
 267  */
 268 NSPR_API(PRStatus) _MD_wait(struct PRThread *, PRIntervalTime timeout);
 269 #define _MD_WAIT _MD_wait
 270
 271 NSPR_API(PRStatus) _MD_WakeupWaiter(struct PRThread *);
 272 #define _MD_WAKEUP_WAITER _MD_WakeupWaiter
 273
 274 NSPR_API(void) _MD_SetPriority(struct _MDThread *thread,
 275         PRThreadPriority newPri);
 276 #define _MD_SET_PRIORITY _MD_SetPriority
 277
 278 #endif /* PTHREADS_USER */
 279
 280 #endif /* nspr_pthread_defs_h___ */