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, 170 insertions, 2 deletions

diff --git a/gcc/gthr-single.h b/gcc/gthr-single.h
index 8fb674667b1..4bfea5e3087 100644
--- a/gcc/gthr-single.h
+++ b/gcc/gthr-single.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.
 
@@ -35,6 +35,172 @@ typedef int __gthread_mutex_t;
 
 #define __GTHREAD_MUTEX_INIT 0
 
+#ifdef _LIBOBJC
+
+/* 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)
+{
+  /* No thread support available */
+  return -1;
+}
+
+/* Close the threads subsystem. */
+static inline int
+__gthread_objc_close_thread_system(void)
+{
+  /* No thread support available */
+  return -1;
+}
+
+/* Backend thread functions */
+
+/* Create a new thread of execution. */
+static inline objc_thread_t
+__gthread_objc_thread_detach(void (*func)(void *arg), void *arg)
+{
+  /* No thread support available */
+  return NULL;
+}
+
+/* Set the current thread's priority. */
+static inline int
+__gthread_objc_thread_set_priority(int priority)
+{
+  /* No thread support available */
+  return -1;
+}
+
+/* Return the current thread's priority. */
+static inline int
+__gthread_objc_thread_get_priority(void)
+{
+  return OBJC_THREAD_INTERACTIVE_PRIORITY;
+}
+
+/* Yield our process time to another thread. */
+static inline void
+__gthread_objc_thread_yield(void)
+{
+  return;
+}
+
+/* Terminate the current thread. */
+static inline int
+__gthread_objc_thread_exit(void)
+{
+  /* No thread support available */
+  /* Should we really exit the program */
+  /* exit(&__objc_thread_exit_status); */
+  return -1;
+}
+
+/* Returns an integer value which uniquely describes a thread. */
+static inline objc_thread_t
+__gthread_objc_thread_id(void)
+{
+  /* No thread support, use 1. */
+  return (objc_thread_t)1;
+}
+
+/* Sets the thread's local storage pointer. */
+static inline int
+__gthread_objc_thread_set_data(void *value)
+{
+  thread_local_storage = value;
+  return 0;
+}
+
+/* Returns the thread's local storage pointer. */
+static inline void *
+__gthread_objc_thread_get_data(void)
+{
+  return thread_local_storage;
+}
+
+/* Backend mutex functions */
+
+/* Allocate a mutex. */
+static inline int
+__gthread_objc_mutex_allocate(objc_mutex_t mutex)
+{
+  return 0;
+}
+
+/* Deallocate a mutex. */
+static inline int
+__gthread_objc_mutex_deallocate(objc_mutex_t mutex)
+{
+  return 0;
+}
+
+/* Grab a lock on a mutex. */
+static inline int
+__gthread_objc_mutex_lock(objc_mutex_t mutex)
+{
+  /* There can only be one thread, so we always get the lock */
+  return 0;
+}
+
+/* Try to grab a lock on a mutex. */
+static inline int
+__gthread_objc_mutex_trylock(objc_mutex_t mutex)
+{
+  /* There can only be one thread, so we always get the lock */
+  return 0;
+}
+
+/* Unlock the mutex */
+static inline int
+__gthread_objc_mutex_unlock(objc_mutex_t mutex)
+{
+  return 0;
+}
+
+/* Backend condition mutex functions */
+
+/* Allocate a condition. */
+static inline int
+__gthread_objc_condition_allocate(objc_condition_t condition)
+{
+  return 0;
+}
+
+/* Deallocate a condition. */
+static inline int
+__gthread_objc_condition_deallocate(objc_condition_t condition)
+{
+  return 0;
+}
+
+/* Wait on the condition */
+static inline int
+__gthread_objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
+{
+  return 0;
+}
+
+/* Wake up all threads waiting on this condition. */
+static inline int
+__gthread_objc_condition_broadcast(objc_condition_t condition)
+{
+  return 0;
+}
+
+/* Wake up one thread waiting on this condition. */
+static inline int
+__gthread_objc_condition_signal(objc_condition_t condition)
+{
+  return 0;
+}
+
+#else /* _LIBOBJC */
+
 static inline int
 __gthread_active_p (void)
 {
@@ -59,4 +225,6 @@ __gthread_mutex_unlock (__gthread_mutex_t *mutex __attribute__ ((__unused__)))
   return 0;
 }
 
+#endif /* _LIBOBJC */
+
 #endif /* not __gthr_single_h */