Applied H.J.Lu's patch to not require -lpthread when compiling single threaded Objective-C programs.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@35141 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 305 insertions, 2 deletions

diff --git a/gcc/gthr-solaris.h b/gcc/gthr-solaris.h
index 0c240608135..fca3084f9a7 100644
--- a/gcc/gthr-solaris.h
+++ b/gcc/gthr-solaris.h
@@ -1,6 +1,6 @@
-/* Threads compatibility routines for libgcc2.  */
+/* Threads compatibility routines for libgcc2 and libobjc.  */
 /* Compile this one with gcc.  */
-/* Copyright (C) 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -60,6 +60,24 @@ typedef mutex_t __gthread_mutex_t;
 #pragma weak mutex_trylock
 #pragma weak mutex_unlock
 
+#ifdef _LIBOBJC
+#pragma weak thr_exit
+#pragma weak thr_keycreate
+#pragma weak thr_getprio
+#pragma weak thr_self
+#pragma weak thr_setprio
+#pragma weak thr_yield
+
+#pragma weak cond_init
+#pragma weak cond_destroy
+#pragma weak cond_wait
+#pragma weak cond_broadcast
+#pragma weak cond_signal
+
+#pragma weak mutex_init
+#pragma weak mutex_destroy
+#endif
+
 /* This will not actually work in Solaris 2.5, since libc contains
    dummy symbols of all thr_* routines. */
 
@@ -81,6 +99,289 @@ __gthread_active_p (void)
 
 #endif /* SUPPORTS_WEAK */
 
+#ifdef _LIBOBJC
+
+/* Key structure for maintaining thread specific storage */
+static thread_key_t _objc_thread_storage;
+
+/* Thread local storage for a single thread */
+static void *thread_local_storage = NULL;
+
+/* Backend initialization functions */
+
+/* Initialize the threads subsystem. */
+static inline int
+__gthread_objc_init_thread_system(void)
+{
+  /* Initialize the thread storage key */
+  if (__gthread_active_p ()
+      && thr_keycreate(&_objc_thread_storage, NULL) == 0)
+    return 0;
+
+  return -1;
+}
+
+/* Close the threads subsystem. */
+static inline int
+__gthread_objc_close_thread_system(void)
+{
+  if (__gthread_active_p ())
+    return 0;
+  else
+    return -1;
+}
+
+/* Backend thread functions */
+
+/* Create a new thread of execution. */
+static inline objc_thread_t
+__gthread_objc_thread_detach(void (*func)(void *), void *arg)
+{
+  objc_thread_t thread_id;
+  thread_t new_thread_id = 0;
+
+  if (!__gthread_active_p ())
+    return NULL;
+ 
+  if (thr_create(NULL, 0, (void *)func, arg,
+  		 THR_DETACHED | THR_NEW_LWP,
+		 &new_thread_id) == 0)
+    thread_id = *(objc_thread_t *)&new_thread_id;
+  else
+    thread_id = NULL;
+  
+  return thread_id;
+}
+
+/* Set the current thread's priority. */
+static inline int
+__gthread_objc_thread_set_priority(int priority)
+{
+  int sys_priority = 0;
+
+  if (!__gthread_active_p ())
+    return -1;
+
+  switch (priority)
+    {
+    case OBJC_THREAD_INTERACTIVE_PRIORITY:
+      sys_priority = 300;
+      break;
+    default:
+    case OBJC_THREAD_BACKGROUND_PRIORITY:
+      sys_priority = 200;
+      break;
+    case OBJC_THREAD_LOW_PRIORITY:
+      sys_priority = 1000;
+      break;
+    }
+
+  /* Change priority */
+  if (thr_setprio(thr_self(), sys_priority) == 0)
+    return 0;
+  else
+    return -1;
+}
+
+/* Return the current thread's priority. */
+static inline int
+__gthread_objc_thread_get_priority(void)
+{
+  int sys_priority;
+
+  if (!__gthread_active_p ())
+    return OBJC_THREAD_INTERACTIVE_PRIORITY;
+                                                   
+  if (thr_getprio(thr_self(), &sys_priority) == 0)
+    {
+      if (sys_priority >= 250)
+	return OBJC_THREAD_INTERACTIVE_PRIORITY;
+      else if (sys_priority >= 150)
+	return OBJC_THREAD_BACKGROUND_PRIORITY;
+      return OBJC_THREAD_LOW_PRIORITY;
+    }
+
+  /* Couldn't get priority. */
+  return -1;
+}
+
+/* Yield our process time to another thread. */
+static inline void
+__gthread_objc_thread_yield(void)
+{
+  if (__gthread_active_p ())
+    thr_yield();
+}
+
+/* Terminate the current thread. */
+static inline int
+__gthread_objc_thread_exit(void)
+{
+  if (__gthread_active_p ())
+    /* exit the thread */
+    thr_exit(&__objc_thread_exit_status);
+
+  /* Failed if we reached here */
+  return -1;
+}
+
+/* Returns an integer value which uniquely describes a thread. */
+static inline objc_thread_t
+__gthread_objc_thread_id(void)
+{
+  if (__gthread_active_p ())
+    return (objc_thread_t)thr_self();
+  else
+    return (objc_thread_t)1;
+}
+
+/* Sets the thread's local storage pointer. */
+static inline int
+__gthread_objc_thread_set_data(void *value)
+{
+  if (__gthread_active_p ())
+    {
+      if (thr_setspecific(_objc_thread_storage, value) == 0)
+	return 0;
+      else
+	return -1;
+    }
+  else
+    {
+      thread_local_storage = value;
+      return 0;
+    }
+}
+
+/* Returns the thread's local storage pointer. */
+static inline void *
+__gthread_objc_thread_get_data(void)
+{
+  void *value = NULL;
+
+  if (__gthread_active_p ())
+    {
+      if (thr_getspecific(_objc_thread_storage, &value) == 0)
+	return value;
+      else
+	return NULL;
+    }
+  else
+    return thread_local_storage;
+}
+
+/* Backend mutex functions */
+
+/* Allocate a mutex. */
+static inline int
+__gthread_objc_mutex_allocate(objc_mutex_t mutex)
+{
+  if (__gthread_active_p ()
+      && mutex_init( (mutex_t *)(&(mutex->backend)), USYNC_THREAD, 0))
+    return -1;
+
+  return 0;
+}
+
+/* Deallocate a mutex. */
+static inline int
+__gthread_objc_mutex_deallocate(objc_mutex_t mutex)
+{
+  if (__gthread_active_p ())
+    mutex_destroy((mutex_t *)(&(mutex->backend)));
+
+  return 0;
+}
+
+/* Grab a lock on a mutex. */
+static inline int
+__gthread_objc_mutex_lock(objc_mutex_t mutex)
+{
+  if (__gthread_active_p ()
+      && mutex_lock((mutex_t *)(&(mutex->backend))) != 0)
+    return -1;
+
+  return 0;
+}
+
+/* Try to grab a lock on a mutex. */
+static inline int
+__gthread_objc_mutex_trylock(objc_mutex_t mutex)
+{
+  if (__gthread_active_p ()
+      && mutex_trylock((mutex_t *)(&(mutex->backend))) != 0)
+    return -1;
+
+  return 0;
+}
+
+/* Unlock the mutex */
+static inline int
+__gthread_objc_mutex_unlock(objc_mutex_t mutex)
+{
+  if (__gthread_active_p ()
+      && mutex_unlock((mutex_t *)(&(mutex->backend))) != 0)
+    return -1;
+
+  return 0;
+}
+
+/* Backend condition mutex functions */
+
+/* Allocate a condition. */
+static inline int
+__gthread_objc_condition_allocate(objc_condition_t condition)
+{
+  if (__gthread_active_p ())
+    return cond_init((cond_t *)(&(condition->backend)), USYNC_THREAD,
+    		     NULL);
+  else
+    return 0;
+}
+
+/* Deallocate a condition. */
+static inline int
+__gthread_objc_condition_deallocate(objc_condition_t condition)
+{
+  if (__gthread_active_p ())
+    return cond_destroy((cond_t *)(&(condition->backend)));
+  else
+    return 0;
+}
+
+/* Wait on the condition */
+static inline int
+__gthread_objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
+{
+  if (__gthread_active_p ())
+    return cond_wait((cond_t *)(&(condition->backend)),
+    		     (mutex_t *)(&(mutex->backend)));
+  else
+    return 0;
+}
+
+/* Wake up all threads waiting on this condition. */
+static inline int
+__gthread_objc_condition_broadcast(objc_condition_t condition)
+{
+  if (__gthread_active_p ())
+    return cond_broadcast((cond_t *)(&(condition->backend)));
+  else
+    return 0;
+}
+
+/* Wake up one thread waiting on this condition. */
+static inline int
+__gthread_objc_condition_signal(objc_condition_t condition)
+{
+  if (__gthread_active_p ())
+    return cond_signal((cond_t *)(&(condition->backend)));
+  else
+    return 0;
+}
+
+#else /* _LIBOBJC */
+
 static inline int
 __gthread_once (__gthread_once_t *once, void (*func) (void))
 {
@@ -174,4 +475,6 @@ __gthread_mutex_unlock (__gthread_mutex_t *mutex)
     return 0;
 }
 
+#endif /* _LIBOBJC */
+
 #endif /* not __gthr_solaris_h */