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Multi processing -> multi threading

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Lorenz Stechauner
2022-12-18 22:18:11 +01:00
parent 44913c1e0e
commit 45514f90ca
13 changed files with 464 additions and 515 deletions
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79
src/logger.c
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@ -36,6 +36,7 @@ typedef struct {
log_msg_t msgs[LOG_BUF_SIZE];
} buf_t;
static pthread_t thread;
static volatile sig_atomic_t logger_alive = 0;
static sem_t sem_buf, sem_buf_free, sem_buf_used;
static buf_t buffer;
@ -149,31 +150,6 @@ static void logger_destroy(void) {
sem_destroy(&sem_buf_used);
}
static int logger_init(void) {
int ret;
// try to initialize all three semaphores
if (sem_init(&sem_buf, 0, 1) != 0 || sem_init(&sem_buf_free, 0, LOG_BUF_SIZE) != 0 || sem_init(&sem_buf_used, 0, 0) != 0) {
err("Unable to initialize semaphore");
logger_destroy();
return -1;
}
// initialize read/write heads
buffer.rd = 0;
buffer.wr = 0;
// initialize thread specific values (keys)
if ((ret = pthread_key_create(&key_name, free)) != 0 || (ret = pthread_key_create(&key_prefix, free)) != 0) {
errno = ret;
err("Unable to initialize thread specific values");
logger_destroy();
return -1;
}
return 0;
}
static int logger_remaining(void) {
int val = 0;
sem_getvalue(&sem_buf_used, &val);
@ -200,14 +176,14 @@ void logger_set_name(const char *restrict name) {
}
void logger_set_prefix(const char *restrict prefix) {
if (key_name == -1) {
if (key_prefix == -1) {
// not initialized
strncpy(global_prefix, prefix, sizeof(global_prefix));
} else {
int ret;
void *ptr = pthread_getspecific(key_name);
void *ptr = pthread_getspecific(key_prefix);
if (!ptr) {
ptr = malloc(LOG_PREFIX_LEN);
pthread_setspecific(key_prefix, ptr);
if ((ret = pthread_setspecific(key_prefix, ptr)) != 0) {
errno = ret;
err("Unable to set thread specific values");
@ -218,14 +194,7 @@ void logger_set_prefix(const char *restrict prefix) {
}
}
void logger_stop(void) {
logger_alive = 0;
}
void logger_thread(void) {
if (logger_init() != 0)
return;
static void *logger_thread(void *arg) {
logger_set_name("logger");
logger_alive = 1;
@ -243,11 +212,47 @@ void logger_thread(void) {
log_msg_t *msg = &buffer.msgs[buffer.wr];
buffer.wr = (buffer.wr + 1) % LOG_BUF_SIZE;
printf("[%s]%s %s\n", msg->name, (msg->prefix[0] != 0) ? msg->prefix : "", msg->txt);
printf("%s[%-6s][%-6s]%s%s %s\n",
(msg->lvl <= LOG_ERROR) ? ERR_STR : ((msg->lvl <= LOG_WARNING) ? WRN_STR : ""),
(msg->name[0] != 0) ? (char *) msg->name : "", level_keywords[msg->lvl], CLR_STR,
(msg->prefix[0] != 0) ? (char *) msg->prefix : "", msg->txt);
// unlock slot in buffer
sem_post(&sem_buf_free);
}
logger_destroy();
return NULL;
}
int logger_init(void) {
int ret;
// try to initialize all three semaphores
if (sem_init(&sem_buf, 0, 1) != 0 || sem_init(&sem_buf_free, 0, LOG_BUF_SIZE) != 0 || sem_init(&sem_buf_used, 0, 0) != 0) {
err("Unable to initialize semaphore");
logger_destroy();
return -1;
}
// initialize read/write heads
buffer.rd = 0;
buffer.wr = 0;
// initialize thread specific values (keys)
if ((ret = pthread_key_create(&key_name, free)) != 0 || (ret = pthread_key_create(&key_prefix, free)) != 0) {
errno = ret;
err("Unable to initialize thread specific values");
logger_destroy();
return -1;
}
pthread_create(&thread, NULL, logger_thread, NULL);
return 0;
}
void logger_stop(void) {
logger_alive = 0;
}