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/*-------------------------------------------------------------------------
* C-Pluff, a plug-in framework for C
* Copyright 2007 Johannes Lehtinen
*
* 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 OR COPYRIGHT HOLDERS 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.
*-----------------------------------------------------------------------*/
/** @file
* Core framework functions
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <assert.h>
#ifdef DLOPEN_LIBTOOL
#include <ltdl.h>
#endif
#include "cpluff.h"
#include "defines.h"
#include "util.h"
#ifdef CP_THREADS
#include "thread.h"
#endif
#include "internal.h"
/* ------------------------------------------------------------------------
* Variables
* ----------------------------------------------------------------------*/
/// Number of initializations
static int initialized = 0;
#ifdef CP_THREADS
/// Framework mutex
static cpi_mutex_t *framework_mutex = NULL;
#elif !defined(NDEBUG)
/// Framework locking count
static int framework_locked = 0;
#endif
/// Fatal error handler, or NULL for default
static cp_fatal_error_func_t fatal_error_handler = NULL;
/* ------------------------------------------------------------------------
* Function definitions
* ----------------------------------------------------------------------*/
CP_C_API const char *cp_get_version(void) {
return CP_VERSION;
}
CP_C_API const char *cp_get_host_type(void) {
return CP_HOST;
}
CP_HIDDEN void cpi_lock_framework(void) {
#if defined(CP_THREADS)
cpi_lock_mutex(framework_mutex);
#elif !defined(NDEBUG)
framework_locked++;
#endif
}
CP_HIDDEN void cpi_unlock_framework(void) {
#if defined(CP_THREADS)
cpi_unlock_mutex(framework_mutex);
#elif !defined(NDEBUG)
assert(framework_locked > 0);
framework_locked--;
#endif
}
static void reset(void) {
#ifdef CP_THREADS
if (framework_mutex != NULL) {
cpi_destroy_mutex(framework_mutex);
framework_mutex = NULL;
}
#endif
}
CP_C_API cp_status_t cp_init(void) {
cp_status_t status = CP_OK;
// Initialize if necessary
do {
if (!initialized) {
bindtextdomain(PACKAGE, CP_DATADIR CP_FNAMESEP_STR "locale");
#ifdef CP_THREADS
if ((framework_mutex = cpi_create_mutex()) == NULL) {
status = CP_ERR_RESOURCE;
break;
}
#endif
#ifdef DLOPEN_LIBTOOL
if (lt_dlinit()) {
status = CP_ERR_RESOURCE;
break;
}
#endif
}
initialized++;
} while (0);
// Rollback on failure
if (status != CP_OK) {
reset();
}
return status;
}
CP_C_API void cp_destroy(void) {
assert(initialized > 0);
initialized--;
if (!initialized) {
#ifdef CP_THREADS
assert(framework_mutex == NULL || !cpi_is_mutex_locked(framework_mutex));
#else
assert(!framework_locked);
#endif
cpi_destroy_all_contexts();
#ifdef DLOPEN_LIBTOOL
lt_dlexit();
#endif
reset();
}
}
CP_C_API void cp_set_fatal_error_handler(cp_fatal_error_func_t error_handler) {
fatal_error_handler = error_handler;
}
CP_HIDDEN void cpi_fatalf(const char *msg, ...) {
va_list params;
char fmsg[256];
// Format message
assert(msg != NULL);
va_start(params, msg);
vsnprintf(fmsg, sizeof(fmsg), msg, params);
va_end(params);
fmsg[sizeof(fmsg)/sizeof(char) - 1] = '\0';
// Call error handler or print the error message
if (fatal_error_handler != NULL) {
fatal_error_handler(fmsg);
} else {
fprintf(stderr, _("C-Pluff: FATAL ERROR: %s\n"), fmsg);
}
// Abort if still alive
abort();
}
CP_HIDDEN void cpi_fatal_null_arg(const char *arg, const char *func) {
cpi_fatalf(_("Argument %s has illegal NULL value in call to function %s."), arg, func);
}
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