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#include "../kit/shared_memory.h"
#include "../kit/threads.h"
#include <stdio.h>
#define NAME "kit_test_interprocess"
enum { DATA_SIZE = 64 };
enum { STATE_INIT, STATE_READY, STATE_DONE };
int run_writer() {
kit_shared_memory_t mem = kit_shared_memory_open(
SZ(NAME), DATA_SIZE, KIT_SHARED_MEMORY_CREATE);
if (mem.status != KIT_OK) {
printf("%s: kit_shared_memory_open failed.\n", __FUNCTION__);
fflush(stdout);
return 1;
}
mem.bytes[0] = STATE_INIT;
for (int i = 1; i < DATA_SIZE; i++) mem.bytes[i] = i;
mem.bytes[0] = STATE_READY;
while (mem.bytes[0] != STATE_DONE) thrd_yield();
return kit_shared_memory_close(&mem);
}
int run_reader() {
kit_shared_memory_t mem;
for (;;) {
mem = kit_shared_memory_open(SZ(NAME), DATA_SIZE,
KIT_SHARED_MEMORY_OPEN);
if (mem.status == KIT_OK)
break;
thrd_yield();
}
if (mem.status != KIT_OK) {
printf("%s: kit_shared_memory_open failed.\n", __FUNCTION__);
fflush(stdout);
return 1;
}
while (mem.bytes[0] != STATE_READY) thrd_yield();
i32 status = 0;
for (i32 i = 1; i < DATA_SIZE; i++)
if (mem.bytes[i] != i) {
printf("%s: wrong byte %d\n", __FUNCTION__, i);
fflush(stdout);
status = 1;
}
mem.bytes[0] = STATE_DONE;
if (kit_shared_memory_close(&mem) != KIT_OK)
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();
printf("Invalid command line argument \"%s\"\n", argv[1]);
return 1;
}
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