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#include "../kit/shared_memory.h"
#include "../kit/shared_mutex.h"
#include "../kit/threads.h"
#include <stdio.h>
#define NAME "kit_test_interprocess"
enum { DATA_SIZE = 64, TIMEOUT = 3 };
typedef struct {
shared_mutex_t m;
i8 state;
i8 bytes[DATA_SIZE];
} shared_data_t;
enum { STATE_INIT, STATE_READY, STATE_DONE };
int run_writer() {
shared_memory_t mem = shared_memory_open(
SZ(NAME), sizeof(shared_data_t), SHARED_MEMORY_CREATE);
if (mem.status != KIT_OK) {
printf("%s: kit_shared_memory_open failed.\n", __FUNCTION__);
fflush(stdout);
return 1;
}
shared_data_t *p = (shared_data_t *) mem.bytes;
shared_mutex_init(&p->m);
unique_lock(&p->m);
p->state = STATE_INIT;
unique_unlock(&p->m);
thrd_yield();
unique_lock(&p->m);
for (int i = 0; i < DATA_SIZE; i++) p->bytes[i] = i;
p->state = STATE_READY;
unique_unlock(&p->m);
struct timespec t0;
timespec_get(&t0, TIME_UTC);
shared_lock(&p->m);
while (p->state != STATE_DONE) {
shared_unlock(&p->m);
struct timespec t1;
timespec_get(&t1, TIME_UTC);
if (t1.tv_sec - t0.tv_sec > TIMEOUT) {
printf("%s: timeout.\n", __FUNCTION__);
shared_memory_close(&mem);
return 1;
}
thrd_yield();
shared_lock(&p->m);
}
shared_unlock(&p->m);
if (shared_memory_close(&mem) != KIT_OK) {
printf("%s: kit_shared_memory_close failed.\n", __FUNCTION__);
fflush(stdout);
return 1;
}
return 0;
}
int run_reader() {
struct timespec t0;
timespec_get(&t0, TIME_UTC);
shared_memory_t mem;
for (;;) {
mem = shared_memory_open(SZ(NAME), sizeof(shared_data_t),
SHARED_MEMORY_OPEN);
if (mem.status == KIT_OK)
break;
struct timespec t1;
timespec_get(&t1, TIME_UTC);
if (t1.tv_sec - t0.tv_sec > TIMEOUT) {
printf("%s: timeout.\n", __FUNCTION__);
return 1;
}
struct timespec delay = { .tv_sec = 0, .tv_nsec = 1000000 };
thrd_sleep(&delay, NULL);
}
shared_data_t *p = (shared_data_t *) mem.bytes;
shared_lock(&p->m);
while (p->state != STATE_READY) {
shared_unlock(&p->m);
struct timespec t1;
timespec_get(&t1, TIME_UTC);
if (t1.tv_sec - t0.tv_sec > TIMEOUT) {
printf("%s: timeout.\n", __FUNCTION__);
return 1;
}
thrd_yield();
shared_lock(&p->m);
}
i32 status = 0;
for (i32 i = 0; i < DATA_SIZE; i++)
if (p->bytes[i] != i) {
printf("%s: wrong byte %d\n", __FUNCTION__, i);
fflush(stdout);
status = 1;
}
shared_unlock(&p->m);
unique_lock(&p->m);
p->state = STATE_DONE;
unique_unlock(&p->m);
if (shared_memory_close(&mem) != KIT_OK) {
printf("%s: kit_shared_memory_close failed.\n", __FUNCTION__);
fflush(stdout);
status = 1;
}
return status;
}
int main(int argc, char **argv) {
if (argc != 2) {
printf("Wrong number of command line arguments %d\n", argc);
return 1;
}
if (strcmp(argv[1], "writer") == 0) {
struct timespec t0;
timespec_get(&t0, TIME_UTC);
i32 status = run_writer();
struct timespec t1;
timespec_get(&t1, TIME_UTC);
i64 sec = t1.tv_sec - t0.tv_sec;
i64 nsec = t1.tv_nsec - t0.tv_nsec;
printf("Done in %.2lf msec\n",
(sec * 1000000000 + nsec) * 0.000001);
fflush(stdout);
return status;
}
if (strcmp(argv[1], "reader") == 0)
return run_reader();
if (strcmp(argv[1], "clean") == 0) {
shared_memory_clean(SZ(NAME));
return 0;
}
printf("Invalid command line argument \"%s\"\n", argv[1]);
return 1;
}
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