Function __register_stat

statistics.c:407–571

* Note: certain statistics (e.g. shm statistics) require different handling, * hence the parameter */

 * hence the <unsafe> parameter
 */
static int __register_stat(str *module, str *name, stat_var **pvar,
					unsigned short flags, void *ctx, int unsafe)
{
	module_stats* mods;
	stat_var **shash;
	stat_var *stat;
	stat_var *it;
	int hash;

	if (module==0 || name==0 || pvar==0) {
		LM_ERR("invalid parameters module=%p, name=%p, pvar=%p \n",
				module, name, pvar);
		goto error;
	}

	if(flags&STAT_NOT_ALLOCATED){
		stat = *pvar;
		goto do_register;
	}
	stat = unsafe ?
			(stat_var*)shm_malloc_unsafe(sizeof(stat_var) +
			(((flags&STAT_SHM_NAME)==0)?name->len:0))
			:
			(stat_var*)shm_malloc(sizeof(stat_var) +
			(((flags&STAT_SHM_NAME)==0)?name->len:0));

	if (stat==0) {
		LM_ERR("no more shm memory\n");
		goto error;
	}
	memset( stat, 0, sizeof(stat_var) );

	if ( (flags&STAT_IS_FUNC)==0 ) {
		stat->u.val = unsafe ?
			(stat_val*)shm_malloc_unsafe(sizeof(stat_val)) :
			(stat_val*)shm_malloc(sizeof(stat_val));
		if (stat->u.val==0) {
			LM_ERR("no more shm memory\n");
			goto error1;
		}
#ifdef NO_ATOMIC_OPS
		*(stat->u.val) = 0;
#else
		atomic_init(stat->u.val, 0);
#endif
		*pvar = stat;
	} else {
		stat->u.f = (stat_function)(pvar);
	}

	/* is the module already recorded? */
do_register:
	mods = get_stat_module(module);
	if (mods==0) {
		mods = __add_stat_module(module, unsafe);
		if (mods==0) {
			LM_ERR("failed to add new module\n");
			goto error2;