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/*
** error.c
**
** Made by (mic)
** Login <mic@laptop>
**
** Started on Mon Mar 15 20:45:09 2010 mic
** Last update Sun May 12 01:17:25 2002 Speed Blue
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <talloc.h>
#include "aff4_errors.h"
/** These slots carry the TLS error keys */
static pthread_key_t error_str_slot;
static pthread_key_t error_value_slot;
void error_dest(void *slot) {
if(slot) talloc_free(slot);
}
void *raise_errors(enum _error_type t, char *reason, ...) {
char *error_buffer;
// This has to succeed:
enum _error_type *type = aff4_get_current_error(&error_buffer);
if(reason) {
va_list ap;
va_start(ap, reason);
vsnprintf(error_buffer, ERROR_BUFFER_SIZE-1, reason,ap);
error_buffer[ERROR_BUFFER_SIZE-1]=0;
va_end(ap);
};
//update the error type
*type = t;
return NULL;
}
static int error_subsystem_initialised=0;
enum _error_type *aff4_get_current_error(char **error_buffer) {
enum _error_type *type;
if(!error_subsystem_initialised) error_init();
type = pthread_getspecific(error_value_slot);
// This is optional
if(error_buffer) {
*error_buffer = pthread_getspecific(error_str_slot);
// If TLS buffers are not set we need to create them
if(!*error_buffer) {
*error_buffer =talloc_size(NULL, ERROR_BUFFER_SIZE);
pthread_setspecific(error_str_slot, *error_buffer);
};
};
if(!type) {
type = talloc(NULL, enum _error_type);
pthread_setspecific(error_value_slot, type);
};
return type;
}
/** Initialise the error subsystem */
void error_init() {
error_subsystem_initialised = 1;
// We create the error buffer slots
if(pthread_key_create(&error_str_slot, error_dest) ||
pthread_key_create(&error_value_slot, error_dest)) {
printf("Unable to set up TLS variables\n");
abort();
};
}
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