74 lines
1.9 KiB
Objective-C
74 lines
1.9 KiB
Objective-C
//===-- blocked.m --------------------------------------------------*- ObjC -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// This file is for testing running "print object" in a case where another thread
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// blocks the print object from making progress. Set a breakpoint on the line in
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// my_pthread_routine as indicated. Then switch threads to the main thread, and
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// do print the lock_me object. Since that will try to get the lock already gotten
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// by my_pthread_routime thread, it will have to switch to running all threads, and
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// that should then succeed.
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//
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#include <Foundation/Foundation.h>
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#include <pthread.h>
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static pthread_mutex_t test_mutex;
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static void Mutex_Init (void)
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{
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pthread_mutexattr_t tmp_mutex_attr;
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pthread_mutexattr_init(&tmp_mutex_attr);
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pthread_mutex_init(&test_mutex, &tmp_mutex_attr);
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}
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@interface LockMe :NSObject
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{
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}
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- (NSString *) description;
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@end
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@implementation LockMe
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- (NSString *) description
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{
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printf ("LockMe trying to get the lock.\n");
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pthread_mutex_lock(&test_mutex);
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printf ("LockMe got the lock.\n");
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pthread_mutex_unlock(&test_mutex);
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return @"I am pretty special.\n";
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}
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@end
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void *
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my_pthread_routine (void *data)
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{
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printf ("my_pthread_routine about to enter.\n");
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pthread_mutex_lock(&test_mutex);
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printf ("Releasing Lock.\n"); // Set a breakpoint here.
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pthread_mutex_unlock(&test_mutex);
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return NULL;
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}
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int
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main ()
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{
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pthread_attr_t tmp_attr;
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pthread_attr_init (&tmp_attr);
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pthread_t my_pthread;
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Mutex_Init ();
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LockMe *lock_me = [[LockMe alloc] init];
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pthread_create (&my_pthread, &tmp_attr, my_pthread_routine, NULL);
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pthread_join (my_pthread, NULL);
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return 0;
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}
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