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/*
* The MIT License
*
* Copyright (C) 2017 Alexander Saprykin <saprykin.spb@gmail.com>
*
* 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.
*/
#include "perror.h"
#include "pfile.h"
#include "plibraryloader.h"
#include "pmem.h"
#include "pstring.h"
#include <dl.h>
#include <errno.h>
#include <string.h>
typedef shl_t plibrary_handle;
struct PLibraryLoader_ {
plibrary_handle handle;
int last_error;
};
static void pp_library_loader_clean_handle (plibrary_handle handle);
static void
pp_library_loader_clean_handle (plibrary_handle handle)
{
if (P_UNLIKELY (shl_unload (handle) != 0))
P_ERROR ("PLibraryLoader::pp_library_loader_clean_handle: shl_unload() failed");
}
P_LIB_API PLibraryLoader *
p_library_loader_new (const pchar *path)
{
PLibraryLoader *loader = NULL;
plibrary_handle handle;
if (!p_file_is_exists (path))
return NULL;
if (P_UNLIKELY ((handle = shl_load (path, BIND_IMMEDIATE | BIND_NONFATAL | DYNAMIC_PATH, 0)) == NULL)) {
P_ERROR ("PLibraryLoader::p_library_loader_new: shl_load() failed");
return NULL;
}
if (P_UNLIKELY ((loader = p_malloc0 (sizeof (PLibraryLoader))) == NULL)) {
P_ERROR ("PLibraryLoader::p_library_loader_new: failed to allocate memory");
pp_library_loader_clean_handle (handle);
return NULL;
}
loader->handle = handle;
loader->last_error = 0;
return loader;
}
P_LIB_API PFuncAddr
p_library_loader_get_symbol (PLibraryLoader *loader, const pchar *sym)
{
PFuncAddr func_addr = NULL;
if (P_UNLIKELY (loader == NULL || sym == NULL || loader->handle == NULL))
return NULL;
if (P_UNLIKELY (shl_findsym (&loader->handle, sym, TYPE_UNDEFINED, (ppointer) &func_addr) != 0)) {
P_ERROR ("PLibraryLoader::p_library_loader_get_symbol: shl_findsym() failed");
loader->last_error = (errno == 0 ? -1 : errno);
return NULL;
}
loader->last_error = 0;
return func_addr;
}
P_LIB_API void
p_library_loader_free (PLibraryLoader *loader)
{
if (P_UNLIKELY (loader == NULL))
return;
pp_library_loader_clean_handle (loader->handle);
p_free (loader);
}
P_LIB_API pchar *
p_library_loader_get_last_error (PLibraryLoader *loader)
{
if (loader == NULL)
return NULL;
if (loader->last_error == 0)
return NULL;
else if (loader->last_error == -1)
return p_strdup ("Failed to find a symbol");
else
return p_strdup (strerror (loader->last_error));
}
P_LIB_API pboolean
p_library_loader_is_ref_counted (void)
{
#if defined (P_OS_HPUX) && defined (P_CPU_HPPA) && (PLIBSYS_SIZEOF_VOID_P == 4)
return FALSE;
#else
return TRUE;
#endif
}
void
p_library_loader_init (void)
{
}
void
p_library_loader_shutdown (void)
{
}
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