dynlib.cc

Go to the documentation of this file.

/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <cstdio>
#include <cstdlib>
#include <cstring>
 
#include "MEM_guardedalloc.h"
 
#include "BLI_dynlib.h"
 
struct DynamicLibrary {
  void *handle;
};
 
#ifdef WIN32
#  define WIN32_LEAN_AND_MEAN
#  include "utf_winfunc.hh"
#  include "utfconv.hh"
#  include <windows.h>
 
DynamicLibrary *BLI_dynlib_open(const char *name)
{
  DynamicLibrary *lib;
  void *handle;
 
  UTF16_ENCODE(name);
  handle = LoadLibraryW(name_16);
  UTF16_UN_ENCODE(name);
 
  if (!handle) {
    return NULL;
  }
 
  lib = MEM_cnew<DynamicLibrary>("Dynamic Library");
  lib->handle = handle;
 
  return lib;
}
 
void *BLI_dynlib_find_symbol(DynamicLibrary *lib, const char *symname)
{
  return GetProcAddress(HMODULE(lib->handle), symname);
}
 
char *BLI_dynlib_get_error_as_string(DynamicLibrary *lib)
{
  int err;
 
  /* if lib is NULL reset the last error code */
  err = GetLastError();
  if (!lib) {
    SetLastError(ERROR_SUCCESS);
  }
 
  if (err) {
    static char buf[1024];
 
    if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
                      NULL,
                      err,
                      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                      buf,
                      sizeof(buf),
                      NULL))
    {
      return buf;
    }
  }
 
  return NULL;
}
 
void BLI_dynlib_close(DynamicLibrary *lib)
{
  FreeLibrary(HMODULE(lib->handle));
  MEM_freeN(lib);
}
 
#else /* Unix */
 
#  include <dlfcn.h>
 
DynamicLibrary *BLI_dynlib_open(const char *name)
{
  DynamicLibrary *lib;
  void *handle = dlopen(name, RTLD_LAZY);
 
  if (!handle) {
    return nullptr;
  }
 
  lib = MEM_cnew<DynamicLibrary>("Dynamic Library");
  lib->handle = handle;
 
  return lib;
}
 
void *BLI_dynlib_find_symbol(DynamicLibrary *lib, const char *symname)
{
  return dlsym(lib->handle, symname);
}
 
char *BLI_dynlib_get_error_as_string(DynamicLibrary *lib)
{
  (void)lib; /* unused */
  return dlerror();
}
 
void BLI_dynlib_close(DynamicLibrary *lib)
{
  dlclose(lib->handle);
  MEM_freeN(lib);
}
 
#endif