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/*
tfifo.c
David Rowe
Nov 19 2012
Tests FIFOs, in particular thread safety.
*/
#include <assert.h>
#include <pthread.h>
#include <stdio.h>
#include "codec2_fifo.h"
#define FIFO_SZ 1024
#define WRITE_SZ 10
#define READ_SZ 8
#define N_MAX 100
#define LOOPS 1000000
int run_thread = 1;
struct FIFO *f;
void writer(void);
void *writer_thread(void *data);
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
#define USE_THREADS
//#define USE_MUTEX
int main() {
pthread_t awriter_thread;
int i, j;
short read_buf[READ_SZ];
int n_out = 0;
int success;
f = codec2_fifo_create(FIFO_SZ);
#ifdef USE_THREADS
pthread_create(&awriter_thread, NULL, writer_thread, NULL);
#endif
for (i = 0; i < LOOPS;) {
#ifndef USE_THREADS
writer();
#endif
#ifdef USE_MUTEX
pthread_mutex_lock(&mutex);
#endif
success = (codec2_fifo_read(f, read_buf, READ_SZ) == 0);
#ifdef USE_MUTEX
pthread_mutex_unlock(&mutex);
#endif
if (success) {
for (j = 0; j < READ_SZ; j++) {
if (read_buf[j] != n_out) {
printf("error: %d %d\n", read_buf[j], n_out);
return (1);
}
n_out++;
if (n_out == N_MAX) n_out = 0;
}
i++;
}
}
#ifdef USE_THREADS
run_thread = 0;
pthread_join(awriter_thread, NULL);
#endif
printf("%d loops tested OK\n", LOOPS);
return 0;
}
int n_in = 0;
void writer(void) {
short write_buf[WRITE_SZ];
int i;
if ((FIFO_SZ - codec2_fifo_used(f)) > WRITE_SZ) {
for (i = 0; i < WRITE_SZ; i++) {
write_buf[i] = n_in++;
if (n_in == N_MAX) n_in = 0;
}
#ifdef USE_MUTEX
pthread_mutex_lock(&mutex);
#endif
codec2_fifo_write(f, write_buf, WRITE_SZ);
pthread_mutex_unlock(&mutex);
}
}
void *writer_thread(void *data) {
while (run_thread) {
writer();
}
return NULL;
}
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