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 #include "windef.h"
  47 #include "winbase.h"
  48 #include "winnls.h"
  49 #include "wine/debug.h"
  50
  51 WINE_DEFAULT_DEBUG_CHANNEL(gstreamer);
  52
  53 static gchar *
  54 g_win32_error_message (gint error)
  55 {
  56   gchar *retval;
  57   WCHAR *msg = NULL;
  58   int nchars;
  59
  60   FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER
  61           |FORMAT_MESSAGE_IGNORE_INSERTS
  62           |FORMAT_MESSAGE_FROM_SYSTEM,
  63           NULL, error, 0,
  64           (LPWSTR) &msg, 0, NULL);
  65   if (msg != NULL)
  66     {
  67       nchars = WideCharToMultiByte(CP_UTF8, 0, msg, -1, NULL, 0, NULL, NULL);
  68
  69       if (nchars > 2 && msg[nchars-1] == '\n' && msg[nchars-2] == '\r')
  70           msg[nchars-2] = '\0';
  71
  72       retval = g_utf16_to_utf8 (msg, -1, NULL, NULL, NULL);
  73
  74       LocalFree (msg);
  75     }
  76   else
  77     retval = g_strdup ("");
  78
  79   return retval;
  80 }
  81
  82 static gint g_thread_priority_map [G_THREAD_PRIORITY_URGENT + 1] = {
  83     THREAD_PRIORITY_BELOW_NORMAL,
  84     THREAD_PRIORITY_NORMAL,
  85     THREAD_PRIORITY_ABOVE_NORMAL,
  86     THREAD_PRIORITY_HIGHEST
  87 };
  88
  89 static DWORD g_thread_self_tls;
  90
  91 /* A "forward" declaration of this structure */
  92 static GThreadFunctions g_thread_functions_for_glib_use_default;
  93
  94 typedef struct _GThreadData GThreadData;
  95 struct _GThreadData
  96 {
  97   GThreadFunc func;
  98   gpointer data;
  99   HANDLE thread;
 100   gboolean joinable;
 101 };
 102
 103 static GMutex *
 104 g_mutex_new_posix_impl (void)
 105 {
 106   GMutex *result = (GMutex *) g_new (pthread_mutex_t, 1);
 107   pthread_mutex_init ((pthread_mutex_t *) result, NULL);
 108   return result;
 109 }
 110
 111 static void
 112 g_mutex_free_posix_impl (GMutex * mutex)
 113 {
 114   pthread_mutex_destroy ((pthread_mutex_t *) mutex);
 115   g_free (mutex);
 116 }
 117
 118 /* NOTE: the functions g_mutex_lock and g_mutex_unlock may not use
 119    functions from gmem.c and gmessages.c; */
 120
 121 /* pthread_mutex_lock, pthread_mutex_unlock can be taken directly, as
 122    signature and semantic are right, but without error check then!!!!,
 123    we might want to change this therefore. */
 124
 125 static gboolean
 126 g_mutex_trylock_posix_impl (GMutex * mutex)
 127 {
 128   int result;
 129
 130   result = pthread_mutex_trylock ((pthread_mutex_t *) mutex);
 131
 132   if (result == EBUSY)
 133     return FALSE;
 134
 135   if (result) ERR("pthread_mutex_trylock %x\n",result);
 136   return TRUE;
 137 }
 138
 139 static GCond *
 140 g_cond_new_posix_impl (void)
 141 {
 142   GCond *result = (GCond *) g_new (pthread_cond_t, 1);
 143   pthread_cond_init ((pthread_cond_t *) result, NULL);
 144   return result;
 145 }
 146
 147 /* pthread_cond_signal, pthread_cond_broadcast and pthread_cond_wait
 148    can be taken directly, as signature and semantic are right, but
 149    without error check then!!!!, we might want to change this
 150    therefore. */
 151
 152 #define G_NSEC_PER_SEC 1000000000
 153
 154 static gboolean
 155 g_cond_timed_wait_posix_impl (GCond * cond,
 156                               GMutex * entered_mutex,
 157                               GTimeVal * abs_time)
 158 {
 159   int result;
 160   struct timespec end_time;
 161   gboolean timed_out;
 162
 163   g_return_val_if_fail (cond != NULL, FALSE);
 164   g_return_val_if_fail (entered_mutex != NULL, FALSE);
 165
 166   if (!abs_time)
 167     {
 168       result = pthread_cond_wait ((pthread_cond_t *)cond,
 169                                   (pthread_mutex_t *) entered_mutex);
 170       timed_out = FALSE;
 171     }
 172   else
 173     {
 174       end_time.tv_sec = abs_time->tv_sec;
 175       end_time.tv_nsec = abs_time->tv_usec * (G_NSEC_PER_SEC / G_USEC_PER_SEC);
 176
 177       g_return_val_if_fail (end_time.tv_nsec < G_NSEC_PER_SEC, TRUE);
 178
 179       result = pthread_cond_timedwait ((pthread_cond_t *) cond,
 180                                        (pthread_mutex_t *) entered_mutex,
 181                                        &end_time);
 182       timed_out = (result == ETIMEDOUT);
 183     }
 184
 185   if (!timed_out)
 186     if (result) ERR("pthread_cond_timedwait %x\n",result);
 187
 188   return !timed_out;
 189 }
 190
 191 static void
 192 g_cond_free_posix_impl (GCond * cond)
 193 {
 194   pthread_cond_destroy ((pthread_cond_t *) cond);
 195   g_free (cond);
 196 }
 197
 198 static GPrivate *
 199 g_private_new_posix_impl (GDestroyNotify destructor)
 200 {
 201   GPrivate *result = (GPrivate *) g_new (pthread_key_t, 1);
 202   pthread_key_create ((pthread_key_t *) result, destructor);
 203   return result;
 204 }
 205
 206 /* NOTE: the functions g_private_get and g_private_set may not use
 207    functions from gmem.c and gmessages.c */
 208
 209 static void
 210 g_private_set_posix_impl (GPrivate * private_key, gpointer value)
 211 {
 212   if (!private_key)
 213     return;
 214   pthread_setspecific (*(pthread_key_t *) private_key, value);
 215 }
 216
 217 static gpointer
 218 g_private_get_posix_impl (GPrivate * private_key)
 219 {
 220   if (!private_key)
 221     return NULL;
 222   return pthread_getspecific (*(pthread_key_t *) private_key);
 223 }
 224
 225 static void
 226 g_thread_set_priority_win32_impl (gpointer thread, GThreadPriority priority)
 227 {
 228   GThreadData *target = *(GThreadData **)thread;
 229
 230   g_return_if_fail ((int)priority >= G_THREAD_PRIORITY_LOW);
 231   g_return_if_fail ((int)priority <= G_THREAD_PRIORITY_URGENT);
 232
 233   SetThreadPriority (target->thread, g_thread_priority_map [priority]);
 234 }
 235
 236 static void
 237 g_thread_self_win32_impl (gpointer thread)
 238 {
 239   GThreadData *self = TlsGetValue (g_thread_self_tls);
 240
 241   if (!self)
 242     {
 243       /* This should only happen for the main thread! */
 244       HANDLE handle = GetCurrentThread ();
 245       HANDLE process = GetCurrentProcess ();
 246       self = g_new (GThreadData, 1);
 247       DuplicateHandle (process, handle, process, &self->thread, 0, FALSE,
 248                         DUPLICATE_SAME_ACCESS);
 249       TlsSetValue (g_thread_self_tls, self);
 250       self->func = NULL;
 251       self->data = NULL;
 252       self->joinable = FALSE;
 253     }
 254
 255   *(GThreadData **)thread = self;
 256 }
 257
 258 static void
 259 g_thread_exit_win32_impl (void)
 260 {
 261   GThreadData *self = TlsGetValue (g_thread_self_tls);
 262
 263   if (self)
 264     {
 265       if (!self->joinable)
 266       {
 267         CloseHandle (self->thread);
 268         g_free (self);
 269       }
 270       TlsSetValue (g_thread_self_tls, NULL);
 271     }
 272
 273   ExitThread (0);
 274 }
 275
 276 static guint __stdcall
 277 g_thread_proxy (gpointer data)
 278 {
 279   GThreadData *self = (GThreadData*) data;
 280
 281   TlsSetValue (g_thread_self_tls, self);
 282
 283   self->func (self->data);
 284
 285   g_thread_exit_win32_impl ();
 286
 287   g_assert_not_reached ();
 288
 289   return 0;
 290 }
 291
 292 static void
 293 g_thread_create_win32_impl (GThreadFunc func,
 294                             gpointer data,
 295                             gulong stack_size,
 296                             gboolean joinable,
 297                             gboolean bound,
 298                             GThreadPriority priority,
 299                             gpointer thread,
 300                             GError **error)
 301 {
 302   guint ignore;
 303   GThreadData *retval;
 304
 305   g_return_if_fail (func);
 306   g_return_if_fail ((int)priority >= G_THREAD_PRIORITY_LOW);
 307   g_return_if_fail ((int)priority <= G_THREAD_PRIORITY_URGENT);
 308
 309   retval = g_new(GThreadData, 1);
 310   retval->func = func;
 311   retval->data = data;
 312
 313   retval->joinable = joinable;
 314
 315   retval->thread = (HANDLE) CreateThread (NULL, stack_size, g_thread_proxy,
 316                                           retval, 0, &ignore);
 317
 318   if (retval->thread == NULL)
 319     {
 320       gchar *win_error = g_win32_error_message (GetLastError ());
 321       g_set_error (error, G_THREAD_ERROR, G_THREAD_ERROR_AGAIN,
 322                    "Error creating thread: %s", win_error);
 323       g_free (retval);
 324       g_free (win_error);
 325       return;
 326     }
 327
 328   *(GThreadData **)thread = retval;
 329
 330   g_thread_set_priority_win32_impl (thread, priority);
 331 }
 332
 333 static void
 334 g_thread_yield_win32_impl (void)
 335 {
 336   Sleep(0);
 337 }
 338
 339 static void
 340 g_thread_join_win32_impl (gpointer thread)
 341 {
 342   GThreadData *target = *(GThreadData **)thread;
 343
 344   g_return_if_fail (target->joinable);
 345
 346   WaitForSingleObject (target->thread, INFINITE);
 347
 348   CloseHandle (target->thread);
 349   g_free (target);
 350 }
 351
 352 static GThreadFunctions g_thread_functions_for_glib_use_default =
 353 {
 354   /* Posix functions here for speed */
 355   g_mutex_new_posix_impl,
 356   (void (*)(GMutex *)) pthread_mutex_lock,
 357   g_mutex_trylock_posix_impl,
 358   (void (*)(GMutex *)) pthread_mutex_unlock,
 359   g_mutex_free_posix_impl,
 360   g_cond_new_posix_impl,
 361   (void (*)(GCond *)) pthread_cond_signal,
 362   (void (*)(GCond *)) pthread_cond_broadcast,
 363   (void (*)(GCond *, GMutex *)) pthread_cond_wait,
 364   g_cond_timed_wait_posix_impl,
 365   g_cond_free_posix_impl,
 366   g_private_new_posix_impl,
 367   g_private_get_posix_impl,
 368   g_private_set_posix_impl,
 369   /* win32 function required here */
 370   g_thread_create_win32_impl,       /* thread */
 371   g_thread_yield_win32_impl,
 372   g_thread_join_win32_impl,
 373   g_thread_exit_win32_impl,
 374   g_thread_set_priority_win32_impl,
 375   g_thread_self_win32_impl,
 376   NULL                             /* no equal function necessary */
 377 };
 378
 379 void g_thread_impl_init (void)
 380 {
 381   static gboolean beenhere = FALSE;
 382
 383   if (beenhere)
 384     return;
 385
 386   beenhere = TRUE;
 387
 388   g_thread_self_tls = TlsAlloc ();
 389   g_thread_init(&g_thread_functions_for_glib_use_default);
 390 }