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1// RUN: %clang_tsan %s -o %t2// RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'3 4#include <Availability.h>5#include <os/lock.h>6#include <pthread.h>7#include <stdio.h>8 9long global_variable;10os_unfair_lock lock = OS_UNFAIR_LOCK_INIT;11char flags_available = 0;12 13void *Thread(void *a) {14 os_unfair_lock_lock(&lock);15 global_variable++;16 os_unfair_lock_unlock(&lock);17 return NULL;18}19 20void *ThreadWithFlags(void *a) {21#if defined(__MAC_15_0) || defined(__IPHONE_18_0) || defined(__TVOS_18_0) || \22 defined(__VISIONOS_2_0) || defined(__WATCHOS_11_0)23# pragma clang diagnostic push24# pragma clang diagnostic ignored "-Wunguarded-availability-new"25 if (os_unfair_lock_lock_with_flags) {26 os_unfair_lock_lock_with_flags(&lock, OS_UNFAIR_LOCK_FLAG_ADAPTIVE_SPIN);27 flags_available = 1;28 } else {29 os_unfair_lock_lock(&lock);30 }31# pragma clang diagnostic pop32#else33 os_unfair_lock_lock(&lock);34#endif35 global_variable++;36 os_unfair_lock_unlock(&lock);37 return NULL;38}39 40int main() {41 pthread_t t1, t2;42 global_variable = 0;43 pthread_create(&t1, NULL, Thread, NULL);44 pthread_create(&t2, NULL, Thread, NULL);45 pthread_join(t1, NULL);46 pthread_join(t2, NULL);47 fprintf(stderr, "global_variable = %ld\n", global_variable);48 49 // CHECK: global_variable = 250 51 pthread_create(&t1, NULL, ThreadWithFlags, NULL);52 pthread_create(&t2, NULL, ThreadWithFlags, NULL);53 pthread_join(t1, NULL);54 pthread_join(t2, NULL);55 fprintf(stderr,56 "global_variable = %ld, os_unfair_lock_lock_with_flags %savailable\n",57 global_variable, flags_available ? "" : "un");58}59 60// CHECK: global_variable = 461