xorg-libxcb-errors/src/xcb_errors.h
Uli Schlachter 322f2e1b81 Document failure scenarios for *_new()
Signed-off-by: Uli Schlachter <psychon@znc.in>
2015-04-04 16:46:07 +02:00

123 lines
4.7 KiB
C

#ifndef __XCB_ERRORS_H__
#define __XCB_ERRORS_H__
/* Copyright © 2015 Uli Schlachter
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the names of the authors or their
* institutions shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization from the authors.
*/
#include <xcb/xcb.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* A context for using this library.
*
* Create a context with @ref xcb_errors_context_new () and destroy it with @ref
* xcb_errors_context_free (). Except for @ref xcb_errors_context_free (), all
* functions in this library are thread-safe and can be called from multiple
* threads at the same time, even on the same context.
*/
typedef struct xcb_errors_context_t xcb_errors_context_t;
/**
* Create a new @ref xcb_errors_context_t.
*
* @param conn A XCB connection which will be used until you destroy the context
* with @ref xcb_errors_context_free ().
* @param ctx A pointer to an xcb_cursor_context_t* which will be modified to
* refer to the newly created context.
* @return 0 on success, -1 otherwise. This function may fail due to memory
* allocation failures or if the connection ends up in an error state.
*/
int xcb_errors_context_new(xcb_connection_t *conn, xcb_errors_context_t **ctx);
/**
* Freed the @ref xcb_cursor_context_t.
*
* @param ctx The context to free.
*/
void xcb_errors_context_free(xcb_errors_context_t *ctx);
/**
* Get the name corresponding to some major code.
*
* @param ctx An errors context, created with @ref xcb_errors_context_new ()
* @param major_code The major code
* @return A string allocated in static storage that contains a name for this
* major code. This will never return NULL, but other functions in this library
* may.
*/
const char *xcb_errors_get_name_for_major_code(xcb_errors_context_t *ctx,
uint8_t major_code);
/**
* Get the name corresponding to some minor code or NULL.
*
* @param ctx An errors context, created with @ref xcb_errors_context_new ()
* @param major_code The major code under which to look up the minor code
* @param major_code The minor code
* @return A string allocated in static storage that contains a name for this
* major code or NULL.
*/
const char *xcb_errors_get_name_for_minor_code(xcb_errors_context_t *ctx,
uint8_t major_code,
uint16_t minor_code);
/**
* Get the name corresponding to some event.
*
* @param ctx An errors context, created with @ref xcb_errors_context_new ()
* @param event_code The response_type of an event.
* @param extension Will be set to the name of the extension that generated this
* event or NULL for unknown errors or core X11 errors. This argument may be
* NULL.
* @return A string allocated in static storage that contains a name for this
* major code. This will never return NULL, but other functions in this library
* may.
*/
const char *xcb_errors_get_name_for_event(xcb_errors_context_t *ctx,
uint8_t event_code, const char **extension);
/**
* Get the name corresponding to some error.
*
* @param ctx An errors context, created with @ref xcb_errors_context_new ()
* @param error_code The error_code of an error reply.
* @param extension Will be set to the name of the extension that generated this
* event or NULL for unknown errors or core X11 errors. This argument may be
* NULL.
* @return A string allocated in static storage that contains a name for this
* major code. This will never return NULL, but other functions in this library
* may.
*/
const char *xcb_errors_get_name_for_error(xcb_errors_context_t *ctx,
uint8_t error_code, const char **extension);
#ifdef __cplusplus
}
#endif
#endif /* __XCB_ERRORS_H__ */