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/*
* Semi-portable (Windows and Unix) plugin loading
*
* Copyright (C) 2008 Peter Johnson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND OTHER CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR OTHER CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <util.h>
#include <string.h>
#include "libyasm-stdint.h"
#include "yasm-plugin.h"
#if defined(_WIN32)
#include <windows.h>
#elif defined(__GNUC__)
#include <dlfcn.h>
#endif
static void **loaded_plugins = NULL;
static int num_loaded_plugins = 0;
static void *
load_dll(const char *name)
{
#if defined(_WIN32)
return LoadLibrary(name);
#elif defined(__GNUC__)
return dlopen(name, RTLD_NOW);
#else
return NULL;
#endif
}
int
load_plugin(const char *name)
{
char *path;
void *lib = NULL;
void (*init_plugin) (void) = NULL;
/* Load library */
path = yasm_xmalloc(strlen(name)+10);
#if defined(_WIN32)
strcpy(path, name);
strcat(path, ".dll");
lib = load_dll(path);
#elif defined(__GNUC__)
strcpy(path, "lib");
strcat(path, name);
strcat(path, ".so");
lib = load_dll(path);
if (!lib) {
strcpy(path, name);
strcat(path, ".so");
lib = load_dll(path);
}
#endif
yasm_xfree(path);
if (!lib)
lib = load_dll(name);
if (!lib)
return 0; /* Didn't load successfully */
/* Add to array of loaded plugins */
loaded_plugins =
yasm_xrealloc(loaded_plugins, (num_loaded_plugins+1)*sizeof(void *));
loaded_plugins[num_loaded_plugins] = lib;
num_loaded_plugins++;
/* Get yasm_init_plugin() function and run it */
#if defined(_WIN32)
init_plugin =
(void (*)(void))GetProcAddress((HINSTANCE)lib, "yasm_init_plugin");
#elif defined(__GNUC__)
init_plugin = (void (*)(void))(uintptr_t)dlsym(lib, "yasm_init_plugin");
#endif
if (!init_plugin)
return 0; /* Didn't load successfully */
init_plugin();
return 1;
}
void
unload_plugins(void)
{
int i;
if (!loaded_plugins)
return;
for (i = 0; i < num_loaded_plugins; i++) {
#if defined(_WIN32)
FreeLibrary((HINSTANCE)loaded_plugins[i]);
#elif defined(__GNUC__)
dlclose(loaded_plugins[i]);
#endif
}
yasm_xfree(loaded_plugins);
num_loaded_plugins = 0;
}
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