mirror of
https://gitlab.gnome.org/GNOME/glib.git
synced 2024-12-24 14:36:13 +01:00
GThread: remove errorcheck mutex support
This can only possibly work if we call g_thread_init(), which we are moving away from.
This commit is contained in:
Ryan Lortie
parent
41cbb40dca
commit
3f93141243
@ -126,15 +126,6 @@ GLIB_VAR guint64 (*g_thread_gettime) (void);
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*/
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void g_thread_init (GThreadFunctions *vtable);
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/* Errorcheck mutexes. If you define G_ERRORCHECK_MUTEXES, then all
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* mutexes will check for re-locking and re-unlocking */
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/* Initialize thread system with errorcheck mutexes. vtable must be
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* NULL. Do not call directly. Use #define G_ERRORCHECK_MUTEXES
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* instead.
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*/
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void g_thread_init_with_errorcheck_mutexes (GThreadFunctions* vtable);
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/* Checks if thread support is initialized. Identical to the
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* g_thread_supported macro but provided for language bindings.
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*/
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@ -143,10 +134,6 @@ gboolean g_thread_get_initialized (void);
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/* A random number to recognize debug calls to g_mutex_... */
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#define G_MUTEX_DEBUG_MAGIC 0xf8e18ad7
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#ifdef G_ERRORCHECK_MUTEXES
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#define g_thread_init(vtable) g_thread_init_with_errorcheck_mutexes (vtable)
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#endif
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/* internal function for fallback static mutex implementation */
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GMutex* g_static_mutex_get_mutex_impl (GMutex **mutex);
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@ -36,7 +36,6 @@
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#include "glib.h"
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#include "gthreadprivate.h"
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static GSystemThread zero_thread; /* This is initialized to all zero */
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static gboolean thread_system_already_initialized = FALSE;
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static gint g_thread_priority_map [G_THREAD_PRIORITY_URGENT + 1];
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@ -60,225 +59,6 @@ static gint g_thread_priority_map [G_THREAD_PRIORITY_URGENT + 1];
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((PRIORITY_NORMAL_VALUE + PRIORITY_URGENT_VALUE * 2) / 3)
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#endif /* PRIORITY_HIGH_VALUE */
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typedef struct _GMutexDebugInfo GMutexDebugInfo;
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struct _GMutexDebugInfo
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{
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gchar *location;
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GSystemThread owner;
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};
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#define G_MUTEX_DEBUG_INFO(mutex) \
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(((GMutexDebugInfo*)(((char*)mutex)+G_MUTEX_SIZE)))
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static GMutex *
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g_mutex_new_errorcheck_impl (void)
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{
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GMutex *retval = g_thread_functions_for_glib_use_default.mutex_new ();
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GMutexDebugInfo *info;
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retval = g_realloc (retval, G_MUTEX_SIZE + sizeof (GMutexDebugInfo));
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info = G_MUTEX_DEBUG_INFO (retval);
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g_system_thread_assign (info->owner, zero_thread);
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info->location = "invalid";
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return retval;
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}
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static void
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g_mutex_lock_errorcheck_impl (GMutex *mutex,
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const gulong magic,
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gchar * const location)
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{
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GMutexDebugInfo *info = G_MUTEX_DEBUG_INFO (mutex);
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gchar *loc = (magic == G_MUTEX_DEBUG_MAGIC) ? location : "unknown";
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GSystemThread self;
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g_thread_functions_for_glib_use.thread_self (&self);
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if (g_system_thread_equal (info->owner, self))
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g_error ("Trying to recursively lock a mutex at '%s', "
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"previously locked at '%s'",
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loc, info->location);
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g_thread_functions_for_glib_use_default.mutex_lock (mutex);
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g_system_thread_assign (info->owner, self);
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info->location = loc;
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}
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static gboolean
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g_mutex_trylock_errorcheck_impl (GMutex *mutex,
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const gulong magic,
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gchar * const location)
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{
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GMutexDebugInfo *info = G_MUTEX_DEBUG_INFO (mutex);
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gchar *loc = (magic == G_MUTEX_DEBUG_MAGIC) ? location : "unknown";
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GSystemThread self;
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g_thread_functions_for_glib_use.thread_self (&self);
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if (g_system_thread_equal (info->owner, self))
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g_error ("Trying to recursivly lock a mutex at '%s', "
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"previously locked at '%s'",
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loc, info->location);
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if (!g_thread_functions_for_glib_use_default.mutex_trylock (mutex))
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return FALSE;
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g_system_thread_assign (info->owner, self);
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info->location = loc;
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return TRUE;
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}
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static void
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g_mutex_unlock_errorcheck_impl (GMutex *mutex,
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const gulong magic,
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gchar * const location)
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{
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GMutexDebugInfo *info = G_MUTEX_DEBUG_INFO (mutex);
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gchar *loc = (magic == G_MUTEX_DEBUG_MAGIC) ? location : "unknown";
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GSystemThread self;
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g_thread_functions_for_glib_use.thread_self (&self);
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if (g_system_thread_equal (info->owner, zero_thread))
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g_error ("Trying to unlock an unlocked mutex at '%s'", loc);
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if (!g_system_thread_equal (info->owner, self))
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g_warning ("Trying to unlock a mutex at '%s', "
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"previously locked by a different thread at '%s'",
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loc, info->location);
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g_system_thread_assign (info->owner, zero_thread);
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info->location = NULL;
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g_thread_functions_for_glib_use_default.mutex_unlock (mutex);
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}
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static void
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g_mutex_free_errorcheck_impl (GMutex *mutex,
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const gulong magic,
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gchar * const location)
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{
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GMutexDebugInfo *info = G_MUTEX_DEBUG_INFO (mutex);
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gchar *loc = (magic == G_MUTEX_DEBUG_MAGIC) ? location : "unknown";
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if (info && !g_system_thread_equal (info->owner, zero_thread))
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g_error ("Trying to free a locked mutex at '%s', "
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"which was previously locked at '%s'",
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loc, info->location);
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g_thread_functions_for_glib_use_default.mutex_free (mutex);
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}
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static void
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g_cond_wait_errorcheck_impl (GCond *cond,
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GMutex *mutex,
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const gulong magic,
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gchar * const location)
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{
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GMutexDebugInfo *info = G_MUTEX_DEBUG_INFO (mutex);
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gchar *loc = (magic == G_MUTEX_DEBUG_MAGIC) ? location : "unknown";
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GSystemThread self;
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g_thread_functions_for_glib_use.thread_self (&self);
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if (g_system_thread_equal (info->owner, zero_thread))
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g_error ("Trying to use an unlocked mutex in g_cond_wait() at '%s'", loc);
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if (!g_system_thread_equal (info->owner, self))
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g_error ("Trying to use a mutex locked by another thread in "
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"g_cond_wait() at '%s'", loc);
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g_system_thread_assign (info->owner, zero_thread);
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loc = info->location;
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g_thread_functions_for_glib_use_default.cond_wait (cond, mutex);
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g_system_thread_assign (info->owner, self);
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info->location = loc;
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}
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static gboolean
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g_cond_timed_wait_errorcheck_impl (GCond *cond,
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GMutex *mutex,
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GTimeVal *end_time,
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const gulong magic,
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gchar * const location)
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{
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GMutexDebugInfo *info = G_MUTEX_DEBUG_INFO (mutex);
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gchar *loc = (magic == G_MUTEX_DEBUG_MAGIC) ? location : "unknown";
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gboolean retval;
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GSystemThread self;
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g_thread_functions_for_glib_use.thread_self (&self);
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if (g_system_thread_equal (info->owner, zero_thread))
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g_error ("Trying to use an unlocked mutex in g_cond_timed_wait() at '%s'",
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loc);
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if (!g_system_thread_equal (info->owner, self))
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g_error ("Trying to use a mutex locked by another thread in "
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"g_cond_timed_wait() at '%s'", loc);
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g_system_thread_assign (info->owner, zero_thread);
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loc = info->location;
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retval = g_thread_functions_for_glib_use_default.cond_timed_wait (cond,
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mutex,
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end_time);
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g_system_thread_assign (info->owner, self);
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info->location = loc;
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return retval;
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}
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/* unshadow function declaration. See gthread.h */
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#undef g_thread_init
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void
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g_thread_init_with_errorcheck_mutexes (GThreadFunctions* init)
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{
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GThreadFunctions errorcheck_functions;
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if (init)
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g_error ("Errorcheck mutexes can only be used for native "
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"thread implementations. Sorry." );
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#ifdef HAVE_G_THREAD_IMPL_INIT
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/* This isn't called in g_thread_init, as it doesn't think to get
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* the default implementation, so we have to call it on our own.
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*
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* We must call this before copying
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* g_thread_functions_for_glib_use_default as the
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* implementation-specific init function might modify the contents
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* of g_thread_functions_for_glib_use_default based on operating
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* system version, C library version, or whatever. */
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g_thread_impl_init();
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#endif /* HAVE_G_THREAD_IMPL_INIT */
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errorcheck_functions = g_thread_functions_for_glib_use_default;
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errorcheck_functions.mutex_new = g_mutex_new_errorcheck_impl;
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errorcheck_functions.mutex_lock =
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(void (*)(GMutex *)) g_mutex_lock_errorcheck_impl;
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errorcheck_functions.mutex_trylock =
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(gboolean (*)(GMutex *)) g_mutex_trylock_errorcheck_impl;
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errorcheck_functions.mutex_unlock =
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(void (*)(GMutex *)) g_mutex_unlock_errorcheck_impl;
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errorcheck_functions.mutex_free =
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(void (*)(GMutex *)) g_mutex_free_errorcheck_impl;
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errorcheck_functions.cond_wait =
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(void (*)(GCond *, GMutex *)) g_cond_wait_errorcheck_impl;
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errorcheck_functions.cond_timed_wait =
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(gboolean (*)(GCond *, GMutex *, GTimeVal *))
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g_cond_timed_wait_errorcheck_impl;
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g_thread_init (&errorcheck_functions);
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}
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void
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g_thread_init (GThreadFunctions* init)
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{
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@ -348,3 +128,11 @@ g_thread_init (GThreadFunctions* init)
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g_thread_init_glib ();
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}
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void
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g_thread_init_with_errorcheck_mutexes (GThreadFunctions *vtable)
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{
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g_assert (vtable == NULL);
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g_thread_init (NULL);
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}
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