mirror of https://github.com/flysand7/ciabatta.git
92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <threads.h>
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#include <stdatomic.h>
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#include <cia/sync.h>
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static void print_string_n(char *str, u64 len) {
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fwrite(str, 1, len, stdout);
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}
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static void print_char(char c) {
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print_string_n(&c, 1);
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}
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static void print_string(char *str) {
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int str_len = 0;
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while(str[str_len] != 0) {
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str_len += 1;
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}
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print_string_n(str, str_len);
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}
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static void print_int(i64 number) {
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if(number < 0) {
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print_char('-');
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number = -number;
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}
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char buf[20];
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buf[19] = 0;
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char *p = buf + sizeof buf - 1;
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do {
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*--p = (number%10) + '0';
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number /= 10;
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} while(number > 0);
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print_string(p);
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}
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static Cia_Mutex g_print_mutex;
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static Cia_Mutex g_mutex;
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static volatile _Atomic i64 n_completed = 0;
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static volatile i64 counter = 0;
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int thrd_func(void *arg) {
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print_string("child thread: ok!\n");
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for(int i = 0; i < 100000; ++i) {
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cia_mutex_lock(&g_mutex);
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counter += 1;
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cia_mutex_unlock(&g_mutex);
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}
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atomic_fetch_add(&n_completed, 1);
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for(;;) {
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if(n_completed == 2) {
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break;
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}
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}
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cia_mutex_lock(&g_print_mutex);
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print_string("child thread: counter = ");
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print_int(counter);
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print_char('\n');
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cia_mutex_unlock(&g_print_mutex);
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return 0;
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}
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int main() {
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print_string("main thread: before\n");
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cia_mutex_init(&g_mutex);
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cia_mutex_init(&g_print_mutex);
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thrd_t thrd;
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int status = thrd_create(&thrd, thrd_func, NULL);
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if(status == thrd_error) {
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print_string("main thread: error creating child thread\n");
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return 1;
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}
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print_string("main thread: after!\n");
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for(int i = 0; i < 100000; ++i) {
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cia_mutex_lock(&g_mutex);
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counter += 1;
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cia_mutex_unlock(&g_mutex);
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}
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atomic_fetch_add(&n_completed, 1);
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for(;;) {
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if(n_completed == 2) {
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break;
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}
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}
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cia_mutex_lock(&g_print_mutex);
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print_string("main thread: counter = ");
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print_int(counter);
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print_char('\n');
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cia_mutex_unlock(&g_print_mutex);
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return 0;
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}
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