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// RUN: %clang_tsan %s -o %t -framework Foundation
// RUN: %run %t 2>&1 | FileCheck %s
#import <Foundation/Foundation.h>
long my_global = 0;
int main(int argc, const char *argv[]) {
fprintf(stderr, "Hello world.\n");
dispatch_queue_t queue = dispatch_queue_create("my.queue", DISPATCH_QUEUE_SERIAL);
dispatch_semaphore_t sem = dispatch_semaphore_create(0);
NSString *path = [NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"temp-gcd-io.%d", getpid()]];
dispatch_io_t channel = dispatch_io_create_with_path(DISPATCH_IO_STREAM, path.fileSystemRepresentation, O_CREAT | O_WRONLY,
0666, queue, ^(int error) { });
dispatch_io_set_high_water(channel, 1);
NSData *ns_data = [NSMutableData dataWithLength:1000];
dispatch_data_t data = dispatch_data_create(ns_data.bytes, ns_data.length, NULL, DISPATCH_DATA_DESTRUCTOR_DEFAULT);
my_global++;
dispatch_io_write(channel, 0, data, queue, ^(bool done, dispatch_data_t remainingData, int error) {
my_global++;
dispatch_async(queue, ^{
my_global++;
if (done) {
dispatch_semaphore_signal(sem);
}
});
});
dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
my_global++;
dispatch_io_close(channel, 0);
channel = dispatch_io_create_with_path(DISPATCH_IO_STREAM, path.fileSystemRepresentation, O_RDONLY,
0, queue, ^(int error) { });
dispatch_io_set_high_water(channel, 1);
my_global++;
dispatch_io_read(channel, 0, SIZE_MAX, queue, ^(bool done, dispatch_data_t remainingData, int error) {
my_global++;
dispatch_async(queue, ^{
my_global++;
if (done) {
dispatch_semaphore_signal(sem);
}
});
});
dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
my_global++;
fprintf(stderr, "Done.\n");
return 0;
}
// CHECK: Hello world.
// CHECK-NOT: WARNING: ThreadSanitizer
// CHECK: Done.
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