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/*
* blogc: A blog compiler.
* Copyright (C) 2014-2017 Rafael G. Martins <rafael@rafaelmartins.eng.br>
*
* This program can be distributed under the terms of the BSD License.
* See the file LICENSE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include "../common/utils.h"
#include "ctx.h"
#include "rules.h"
#include "reloader.h"
// we are not going to unit-test these functions, then printing errors
// directly is not a big issue
static void*
bm_reloader_thread(void *arg)
{
bm_reloader_t *reloader = arg;
while (reloader->running) {
if (!bm_ctx_reload(reloader->ctx)) {
fprintf(stderr, "blogc-make: warning: failed to reload context. "
"retrying in 5 seconds ...\n\n");
sleep(5);
continue;
}
if (0 != reloader->rule_exec(reloader->ctx, reloader->outputs, reloader->args)) {
fprintf(stderr, "blogc-make: warning: failed to rebuild website. "
"retrying in 5 seconds ...\n\n");
sleep(5);
continue;
}
sleep(1);
}
free(reloader);
return NULL;
}
bm_reloader_t*
bm_reloader_new(bm_ctx_t *ctx, bm_rule_exec_func_t rule_exec,
bc_slist_t *outputs, bc_trie_t *args)
{
// first rule_exec call is syncronous, to do a 'sanity check'
if (0 != rule_exec(ctx, outputs, args))
return NULL;
int err;
pthread_attr_t attr;
if (0 != (err = pthread_attr_init(&attr))) {
fprintf(stderr, "blogc-make: error: failed to initialize reloader "
"thread attributes: %s\n", strerror(err));
return NULL;
}
// we run the thread detached, because we don't want to wait it to join
// before exiting. the OS can clean it properly
if (0 != (err = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED))) {
fprintf(stderr, "blogc-make: error: failed to mark reloader thread as "
"detached: %s\n", strerror(err));
return NULL;
}
bm_reloader_t *rv = bc_malloc(sizeof(bm_reloader_t));
rv->ctx = ctx;
rv->rule_exec = rule_exec;
rv->outputs = outputs;
rv->args = args;
rv->running = true;
pthread_t thread;
if (0 != (err = pthread_create(&thread, &attr, bm_reloader_thread, rv))) {
fprintf(stderr, "blogc-make: error: failed to create reloader "
"thread: %s\n", strerror(err));
free(rv);
return NULL;
}
return rv;
}
void
bm_reloader_stop(bm_reloader_t *reloader)
{
if (reloader == NULL)
return;
reloader->running = false;
}
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