mirror of
https://github.com/ultimatepp/ultimatepp.git
synced 2026-05-16 22:02:58 -06:00
96 lines
2.1 KiB
C++
96 lines
2.1 KiB
C++
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <pthread.h>
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//#include <Core/Core.h>
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#ifndef TLS_PRE_ALLOC
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#define TLS_PRE_ALLOC false
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#endif
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#ifndef NUM_THREADS
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#define NUM_THREADS 10
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#endif
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#ifndef NUM_TESTS
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#define NUM_TESTS 1<<28
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#endif
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pthread_key_t p_key;
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struct tls_ {
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int id;
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long check;
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};
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#if TLS_PRE_ALLOC
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static tls_ tls[NUM_THREADS];
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#endif
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bool update_tls() {
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tls_ *tmp = (tls_*)pthread_getspecific(p_key);
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volatile long chk = tmp->check;
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tmp->check += 1;
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if (chk+1 == tmp->check)
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return true;
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else
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return false;
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}
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void* work(void* p_tls) {
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pthread_setspecific(p_key, p_tls);
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printf("Starting thread id: %d, v: %d\n", ((tls_*)pthread_getspecific(p_key))->id, ((tls_*)pthread_getspecific(p_key))->check);
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int test_nr = 0;
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do {
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if (!update_tls())
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return NULL;
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} while (NUM_TESTS < 0 || ++test_nr < NUM_TESTS);
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tls_ *tmp = (tls_*)pthread_getspecific(p_key);
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printf("Leaving thread %d value %d ...\n", tmp->id, tmp->check);
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#if !TLS_PRE_ALLOC
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free(tmp);
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pthread_setspecific(p_key, NULL);
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#endif
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return (void*)-1;
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}
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int main(int argc, const char *argv[])
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{
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clock_t clk = clock();
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pthread_key_create(&p_key, NULL);
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pthread_t threads[NUM_THREADS];
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long ret;
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void* ret_ptr = &ret;
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int thread_id = 0;
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while (thread_id < NUM_THREADS) {
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#if TLS_PRE_ALLOC
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printf("Thread specific data is pre allocated ...\n", thread_id);
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tls[thread_id].id = thread_id;
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tls[thread_id].check = thread_id;
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if (pthread_create(&threads[thread_id], NULL, work, &tls[thread_id]) != 0) {
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printf("Cannot create thread %d\n", thread_id);
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break;
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}
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#else
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printf("Allocating thread specific data for thread %d ...\n", thread_id);
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tls_ *tls = new tls_;
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tls->id = thread_id;
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tls->check = thread_id;
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if (pthread_create(&threads[thread_id], NULL, work, tls) != 0) {
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printf("Cannot create thread %d\n", thread_id);
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break;
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}
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#endif
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thread_id++;
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}
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for (int i=0; i < thread_id; i++) {
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pthread_join(threads[i], &ret_ptr);
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if (!ret_ptr)
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printf("thread %d TSS update has errors !!!\n", i);
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}
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pthread_key_delete(p_key);
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printf("CPU time: %f\n", (float)(clock()-clk)/CLOCKS_PER_SEC);
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return 0;
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}
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