mirror of
https://github.com/RGBCube/serenity
synced 2025-05-31 07:08:10 +00:00
66a2b582c3
This patch adds these API's: - pthread_mutex_init() - pthread_mutex_lock() - pthread_mutex_unlock() No mutex attributes are supported yet, so we only do the simplest mutex wihout recursive locking.
72 lines
1.7 KiB
C++
72 lines
1.7 KiB
C++
#include <pthread.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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static int mutex_test();
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int main(int argc, char** argv)
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{
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if (argc == 2 && *argv[1] == 'm')
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return mutex_test();
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printf("Hello from the first thread!\n");
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pthread_t thread_id;
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int rc = pthread_create(
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&thread_id, nullptr, [](void*) -> void* {
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printf("Hi there, from the second thread!\n");
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pthread_exit((void*)0xDEADBEEF);
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return nullptr;
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},
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nullptr);
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if (rc < 0) {
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perror("pthread_create");
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return 1;
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}
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void* retval;
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rc = pthread_join(thread_id, &retval);
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if (rc < 0) {
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perror("pthread_join");
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return 1;
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}
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printf("Okay, joined and got retval=%p\n", retval);
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return 0;
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}
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static pthread_mutex_t mutex;
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int mutex_test()
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{
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int rc = pthread_mutex_init(&mutex, nullptr);
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if (rc < 0) {
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perror("pthread_mutex_init");
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return 1;
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}
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pthread_t thread_id;
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rc = pthread_create(
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&thread_id, nullptr, [](void*) -> void* {
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printf("I'm the secondary thread :^)\n");
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for (;;) {
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pthread_mutex_lock(&mutex);
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printf("Second thread stole mutex\n");
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sleep(1);
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printf("Second thread giving back mutex\n");
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pthread_mutex_unlock(&mutex);
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sleep(1);
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}
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pthread_exit((void*)0xDEADBEEF);
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return nullptr;
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},
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nullptr);
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if (rc < 0) {
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perror("pthread_create");
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return 1;
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}
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for (;;) {
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pthread_mutex_lock(&mutex);
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printf("Obnoxious spam!\n");
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pthread_mutex_unlock(&mutex);
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usleep(10000);
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}
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return 0;
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}
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