198 lines
5.9 KiB
C
198 lines
5.9 KiB
C
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is libguac.
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*
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* The Initial Developer of the Original Code is
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* Michael Jumper.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#ifdef HAVE_LIBPTHREAD
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#include <pthread.h>
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#endif
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#include "error.h"
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/* Error strings */
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const char* __GUAC_STATUS_SUCCESS_STR = "Success";
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const char* __GUAC_STATUS_NO_MEMORY_STR = "Insufficient memory";
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const char* __GUAC_STATUS_NO_INPUT_STR = "End of input stream";
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const char* __GUAC_STATUS_INPUT_TIMEOUT_STR = "Read timeout";
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const char* __GUAC_STATUS_OUTPUT_ERROR_STR = "Output error";
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const char* __GUAC_STATUS_BAD_ARGUMENT_STR = "Invalid argument";
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const char* __GUAC_STATUS_BAD_STATE_STR = "Illegal state";
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const char* __GUAC_STATUS_INVALID_STATUS_STR = "UNKNOWN STATUS CODE";
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const char* guac_status_string(guac_status status) {
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switch (status) {
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/* No error */
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case GUAC_STATUS_SUCCESS:
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return __GUAC_STATUS_SUCCESS_STR;
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/* Out of memory */
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case GUAC_STATUS_NO_MEMORY:
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return __GUAC_STATUS_NO_MEMORY_STR;
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/* End of input */
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case GUAC_STATUS_NO_INPUT:
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return __GUAC_STATUS_NO_INPUT_STR;
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/* Input timeout */
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case GUAC_STATUS_INPUT_TIMEOUT:
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return __GUAC_STATUS_INPUT_TIMEOUT_STR;
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/* Further information in errno */
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case GUAC_STATUS_SEE_ERRNO:
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return strerror(errno);
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/* Output error */
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case GUAC_STATUS_OUTPUT_ERROR:
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return __GUAC_STATUS_OUTPUT_ERROR_STR;
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/* Invalid argument */
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case GUAC_STATUS_BAD_ARGUMENT:
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return __GUAC_STATUS_BAD_ARGUMENT_STR;
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/* Illegal state */
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case GUAC_STATUS_BAD_STATE:
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return __GUAC_STATUS_BAD_STATE_STR;
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default:
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return __GUAC_STATUS_INVALID_STATUS_STR;
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}
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}
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#ifdef HAVE_LIBPTHREAD
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/* PThread implementation of __guac_error */
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static pthread_key_t __guac_error_key;
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static pthread_once_t __guac_error_key_init = PTHREAD_ONCE_INIT;
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static pthread_key_t __guac_error_message_key;
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static pthread_once_t __guac_error_message_key_init = PTHREAD_ONCE_INIT;
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static void __guac_free_pointer(void* pointer) {
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/* Free memory allocated to status variable */
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free(pointer);
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}
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static void __guac_alloc_error_key() {
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/* Create key, destroy any allocated variable on thread exit */
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pthread_key_create(&__guac_error_key, __guac_free_pointer);
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}
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static void __guac_alloc_error_message_key() {
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/* Create key, destroy any allocated variable on thread exit */
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pthread_key_create(&__guac_error_message_key, __guac_free_pointer);
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}
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guac_status* __guac_error() {
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/* Pointer for thread-local data */
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guac_status* status;
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/* Init error key, if not already initialized */
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pthread_once(&__guac_error_key_init, __guac_alloc_error_key);
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/* Retrieve thread-local status variable */
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status = (guac_status*) pthread_getspecific(__guac_error_key);
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/* Allocate thread-local status variable if not already allocated */
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if (status == NULL) {
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status = malloc(sizeof(guac_status));
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pthread_setspecific(__guac_error_key, status);
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}
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return status;
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}
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const char** __guac_error_message() {
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/* Pointer for thread-local data */
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const char** message;
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/* Init error message key, if not already initialized */
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pthread_once(
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&__guac_error_message_key_init,
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__guac_alloc_error_message_key
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);
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/* Retrieve thread-local message variable */
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message = (const char**) pthread_getspecific(__guac_error_message_key);
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/* Allocate thread-local message variable if not already allocated */
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if (message == NULL) {
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message = malloc(sizeof(const char*));
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pthread_setspecific(__guac_error_message_key, message);
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}
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return message;
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}
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#else
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/* Default (not-threadsafe) implementation */
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static guac_status __guac_error_unsafe_storage;
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static const char** __guac_error_message_unsafe_storage;
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guac_status* __guac_error() {
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return &__guac_error_unsafe_storage;
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}
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const char** __guac_error_message() {
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return &__guac_error_message_unsafe_storage;
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}
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/* Warn about threadsafety */
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#warn No threadsafe implementation of __guac_error exists for your platform, so a default non-threadsafe implementation has been used instead. This may lead to incorrect status codes being reported for failures. Please consider adding support for your platform, or filing a bug report with the Guacamole project.
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#endif
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