dlls/winegstreamer/glibthread.c

   1 /* GLIB - Library of useful routines for C programming
   2  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * Wine GStreamer integration
   5  * Copyright 2010 Aric Stewart, CodeWeavers
   6  *
   7  * gthread.c: solaris thread system implementation
   8  * Copyright 1998-2001 Sebastian Wilhelmi; University of Karlsruhe
   9  * Copyright 2001 Hans Breuer
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2.1 of the License, or (at your option) any later version.
  15  *
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  24  */
  25
  26 /*
  27  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
  28  * file for a list of people on the GLib Team.  See the ChangeLog
  29  * files for a list of changes.  These files are distributed with
  30  * GLib at ftp://ftp.gtk.org/pub/gtk/.
  31  */
  32
  33 #include "config.h"
  34
  35 #ifdef HAVE_PTHREAD_H
  36 #include <pthread.h>
  37 #endif
  38
  39 #include <glib.h>
  40
  41 #include <errno.h>
  42 #include <stdarg.h>
  43 #include <stdlib.h>
  44 #include <stdio.h>
  45
  46 #if 0
  47 #include "windef.h"
  48 #include "winbase.h"
  49 #include "winnls.h"
  50 #include "wine/debug.h"
  51
  52 WINE_DEFAULT_DEBUG_CHANNEL(gstreamer);
  53
  54 static gchar *
  55 g_win32_error_message (gint error)
  56 {
  57   gchar *retval;
  58   WCHAR *msg = NULL;
  59   int nchars;
  60
  61   FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER
  62           |FORMAT_MESSAGE_IGNORE_INSERTS
  63           |FORMAT_MESSAGE_FROM_SYSTEM,
  64           NULL, error, 0,
  65           (LPWSTR) &msg, 0, NULL);
  66   if (msg != NULL)
  67     {
  68       nchars = WideCharToMultiByte(CP_UTF8, 0, msg, -1, NULL, 0, NULL, NULL);
  69
  70       if (nchars > 2 && msg[nchars-1] == '\n' && msg[nchars-2] == '\r')
  71           msg[nchars-2] = '\0';
  72
  73       retval = g_utf16_to_utf8 (msg, -1, NULL, NULL, NULL);
  74
  75       LocalFree (msg);
  76     }
  77   else
  78     retval = g_strdup ("");
  79
  80   return retval;
  81 }
  82
  83 static gint g_thread_priority_map [G_THREAD_PRIORITY_URGENT + 1] = {
  84     THREAD_PRIORITY_BELOW_NORMAL,
  85     THREAD_PRIORITY_NORMAL,
  86     THREAD_PRIORITY_ABOVE_NORMAL,
  87     THREAD_PRIORITY_HIGHEST
  88 };
  89
  90 static DWORD g_thread_self_tls;
  91
  92 /* A "forward" declaration of this structure */
  93 static GThreadFunctions g_thread_functions_for_glib_use_default;
  94
  95 typedef struct _GThreadData GThreadData;
  96 struct _GThreadData
  97 {
  98   GThreadFunc func;
  99   gpointer data;
 100   HANDLE thread;
 101   gboolean joinable;
 102 };
 103
 104 static GMutex *
 105 g_mutex_new_posix_impl (void)
 106 {
 107   GMutex *result = (GMutex *) g_new (pthread_mutex_t, 1);
 108   pthread_mutex_init ((pthread_mutex_t *) result, NULL);
 109   return result;
 110 }
 111
 112 static void
 113 g_mutex_free_posix_impl (GMutex * mutex)
 114 {
 115   pthread_mutex_destroy ((pthread_mutex_t *) mutex);
 116   g_free (mutex);
 117 }
 118
 119 /* NOTE: the functions g_mutex_lock and g_mutex_unlock may not use
 120    functions from gmem.c and gmessages.c; */
 121
 122 /* pthread_mutex_lock, pthread_mutex_unlock can be taken directly, as
 123    signature and semantic are right, but without error check then!!!!,
 124    we might want to change this therefore. */
 125
 126 static gboolean
 127 g_mutex_trylock_posix_impl (GMutex * mutex)
 128 {
 129   int result;
 130
 131   result = pthread_mutex_trylock ((pthread_mutex_t *) mutex);
 132
 133   if (result == EBUSY)
 134     return FALSE;
 135
 136   if (result) ERR("pthread_mutex_trylock %x\n",result);
 137   return TRUE;
 138 }
 139
 140 static GCond *
 141 g_cond_new_posix_impl (void)
 142 {
 143   GCond *result = (GCond *) g_new (pthread_cond_t, 1);
 144   pthread_cond_init ((pthread_cond_t *) result, NULL);
 145   return result;
 146 }
 147
 148 /* pthread_cond_signal, pthread_cond_broadcast and pthread_cond_wait
 149    can be taken directly, as signature and semantic are right, but
 150    without error check then!!!!, we might want to change this
 151    therefore. */
 152
 153 #define G_NSEC_PER_SEC 1000000000
 154
 155 static gboolean
 156 g_cond_timed_wait_posix_impl (GCond * cond,
 157                               GMutex * entered_mutex,
 158                               GTimeVal * abs_time)
 159 {
 160   int result;
 161   struct timespec end_time;
 162   gboolean timed_out;
 163
 164   g_return_val_if_fail (cond != NULL, FALSE);
 165   g_return_val_if_fail (entered_mutex != NULL, FALSE);
 166
 167   if (!abs_time)
 168     {
 169       result = pthread_cond_wait ((pthread_cond_t *)cond,
 170                                   (pthread_mutex_t *) entered_mutex);
 171       timed_out = FALSE;
 172     }
 173   else
 174     {
 175       end_time.tv_sec = abs_time->tv_sec;
 176       end_time.tv_nsec = abs_time->tv_usec * (G_NSEC_PER_SEC / G_USEC_PER_SEC);
 177
 178       g_return_val_if_fail (end_time.tv_nsec < G_NSEC_PER_SEC, TRUE);
 179
 180       result = pthread_cond_timedwait ((pthread_cond_t *) cond,
 181                                        (pthread_mutex_t *) entered_mutex,
 182                                        &end_time);
 183       timed_out = (result == ETIMEDOUT);
 184     }
 185
 186   if (!timed_out)
 187     if (result) ERR("pthread_cond_timedwait %x\n",result);
 188
 189   return !timed_out;
 190 }
 191
 192 static void
 193 g_cond_free_posix_impl (GCond * cond)
 194 {
 195   pthread_cond_destroy ((pthread_cond_t *) cond);
 196   g_free (cond);
 197 }
 198
 199 static GPrivate *
 200 g_private_new_posix_impl (GDestroyNotify destructor)
 201 {
 202   GPrivate *result = (GPrivate *) g_new (pthread_key_t, 1);
 203   pthread_key_create ((pthread_key_t *) result, destructor);
 204   return result;
 205 }
 206
 207 /* NOTE: the functions g_private_get and g_private_set may not use
 208    functions from gmem.c and gmessages.c */
 209
 210 static void
 211 g_private_set_posix_impl (GPrivate * private_key, gpointer value)
 212 {
 213   if (!private_key)
 214     return;
 215   pthread_setspecific (*(pthread_key_t *) private_key, value);
 216 }
 217
 218 static gpointer
 219 g_private_get_posix_impl (GPrivate * private_key)
 220 {
 221   if (!private_key)
 222     return NULL;
 223   return pthread_getspecific (*(pthread_key_t *) private_key);
 224 }
 225
 226 static void
 227 g_thread_set_priority_win32_impl (gpointer thread, GThreadPriority priority)
 228 {
 229   GThreadData *target = *(GThreadData **)thread;
 230
 231   g_return_if_fail ((int)priority >= G_THREAD_PRIORITY_LOW);
 232   g_return_if_fail ((int)priority <= G_THREAD_PRIORITY_URGENT);
 233
 234   SetThreadPriority (target->thread, g_thread_priority_map [priority]);
 235 }
 236
 237 static void
 238 g_thread_self_win32_impl (gpointer thread)
 239 {
 240   GThreadData *self = TlsGetValue (g_thread_self_tls);
 241
 242   if (!self)
 243     {
 244       /* This should only happen for the main thread! */
 245       HANDLE handle = GetCurrentThread ();
 246       HANDLE process = GetCurrentProcess ();
 247       self = g_new (GThreadData, 1);
 248       DuplicateHandle (process, handle, process, &self->thread, 0, FALSE,
 249                         DUPLICATE_SAME_ACCESS);
 250       TlsSetValue (g_thread_self_tls, self);
 251       self->func = NULL;
 252       self->data = NULL;
 253       self->joinable = FALSE;
 254     }
 255
 256   *(GThreadData **)thread = self;
 257 }
 258
 259 static void
 260 g_thread_exit_win32_impl (void)
 261 {
 262   GThreadData *self = TlsGetValue (g_thread_self_tls);
 263
 264   if (self)
 265     {
 266       if (!self->joinable)
 267       {
 268         CloseHandle (self->thread);
 269         g_free (self);
 270       }
 271       TlsSetValue (g_thread_self_tls, NULL);
 272     }
 273
 274   ExitThread (0);
 275 }
 276
 277 static guint __stdcall
 278 g_thread_proxy (gpointer data)
 279 {
 280   GThreadData *self = (GThreadData*) data;
 281
 282   TlsSetValue (g_thread_self_tls, self);
 283
 284   self->func (self->data);
 285
 286   g_thread_exit_win32_impl ();
 287
 288   g_assert_not_reached ();
 289
 290   return 0;
 291 }
 292
 293 static void
 294 g_thread_create_win32_impl (GThreadFunc func,
 295                             gpointer data,
 296                             gulong stack_size,
 297                             gboolean joinable,
 298                             gboolean bound,
 299                             GThreadPriority priority,
 300                             gpointer thread,
 301                             GError **error)
 302 {
 303   guint ignore;
 304   GThreadData *retval;
 305
 306   g_return_if_fail (func);
 307   g_return_if_fail ((int)priority >= G_THREAD_PRIORITY_LOW);
 308   g_return_if_fail ((int)priority <= G_THREAD_PRIORITY_URGENT);
 309
 310   retval = g_new(GThreadData, 1);
 311   retval->func = func;
 312   retval->data = data;
 313
 314   retval->joinable = joinable;
 315
 316   retval->thread = (HANDLE) CreateThread (NULL, stack_size, g_thread_proxy,
 317                                           retval, 0, &ignore);
 318
 319   if (retval->thread == NULL)
 320     {
 321       gchar *win_error = g_win32_error_message (GetLastError ());
 322       g_set_error (error, G_THREAD_ERROR, G_THREAD_ERROR_AGAIN,
 323                    "Error creating thread: %s", win_error);
 324       g_free (retval);
 325       g_free (win_error);
 326       return;
 327     }
 328
 329   *(GThreadData **)thread = retval;
 330
 331   g_thread_set_priority_win32_impl (thread, priority);
 332 }
 333
 334 static void
 335 g_thread_yield_win32_impl (void)
 336 {
 337   Sleep(0);
 338 }
 339
 340 static void
 341 g_thread_join_win32_impl (gpointer thread)
 342 {
 343   GThreadData *target = *(GThreadData **)thread;
 344
 345   g_return_if_fail (target->joinable);
 346
 347   WaitForSingleObject (target->thread, INFINITE);
 348
 349   CloseHandle (target->thread);
 350   g_free (target);
 351 }
 352
 353 static GThreadFunctions g_thread_functions_for_glib_use_default =
 354 {
 355   /* Posix functions here for speed */
 356   g_mutex_new_posix_impl,
 357   (void (*)(GMutex *)) pthread_mutex_lock,
 358   g_mutex_trylock_posix_impl,
 359   (void (*)(GMutex *)) pthread_mutex_unlock,
 360   g_mutex_free_posix_impl,
 361   g_cond_new_posix_impl,
 362   (void (*)(GCond *)) pthread_cond_signal,
 363   (void (*)(GCond *)) pthread_cond_broadcast,
 364   (void (*)(GCond *, GMutex *)) pthread_cond_wait,
 365   g_cond_timed_wait_posix_impl,
 366   g_cond_free_posix_impl,
 367   g_private_new_posix_impl,
 368   g_private_get_posix_impl,
 369   g_private_set_posix_impl,
 370   /* win32 function required here */
 371   g_thread_create_win32_impl,       /* thread */
 372   g_thread_yield_win32_impl,
 373   g_thread_join_win32_impl,
 374   g_thread_exit_win32_impl,
 375   g_thread_set_priority_win32_impl,
 376   g_thread_self_win32_impl,
 377   NULL                             /* no equal function necessary */
 378 };
 379
 380 void g_thread_impl_init (void)
 381 {
 382   static gboolean beenhere = FALSE;
 383
 384   if (beenhere)
 385     return;
 386
 387   beenhere = TRUE;
 388
 389   g_thread_self_tls = TlsAlloc ();
 390   g_thread_init(&g_thread_functions_for_glib_use_default);
 391 }
 392
 393 #else
 394
 395 void g_thread_impl_init (void)
 396 {
 397   static gboolean beenhere = FALSE;
 398
 399   if (!beenhere++)
 400     g_thread_init(NULL);
 401 }
 402
 403 #endif