dl.c File Reference

#include "uv.h"
#include "internal.h"

Go to the source code of this file.

Functions
static int	uv__dlerror (uv_lib_t *lib, const char *filename, DWORD errorno)
int	uv_dlopen (const char *filename, uv_lib_t *lib)
void	uv_dlclose (uv_lib_t *lib)
int	uv_dlsym (uv_lib_t *lib, const char *name, void **ptr)
const char *	uv_dlerror (const uv_lib_t *lib)
static void	uv__format_fallback_error (uv_lib_t *lib, int errorno)

Function Documentation

uv__dlerror()

static int uv__dlerror ( uv_lib_t *  lib, const char *  filename, DWORD  errorno  )

static

Definition at line 93 of file dl.c.

                                                                           {
  DWORD_PTR arg;
  DWORD res;
  char* msg;
 
  if (lib->errmsg) {
    LocalFree(lib->errmsg);
    lib->errmsg = NULL;
  }
 
  if (errorno == 0)
    return 0;
 
  res = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
                       FORMAT_MESSAGE_FROM_SYSTEM |
                       FORMAT_MESSAGE_IGNORE_INSERTS, NULL, errorno,
                       MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
                       (LPSTR) &lib->errmsg, 0, NULL);
 
  if (!res && (GetLastError() == ERROR_MUI_FILE_NOT_FOUND ||
               GetLastError() == ERROR_RESOURCE_TYPE_NOT_FOUND)) {
    res = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
                         FORMAT_MESSAGE_FROM_SYSTEM |
                         FORMAT_MESSAGE_IGNORE_INSERTS, NULL, errorno,
                         0, (LPSTR) &lib->errmsg, 0, NULL);
  }
 
  if (res && errorno == ERROR_BAD_EXE_FORMAT && strstr(lib->errmsg, "%1")) {
    msg = lib->errmsg;
    lib->errmsg = NULL;
    arg = (DWORD_PTR) filename;
    res = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
                         FORMAT_MESSAGE_ARGUMENT_ARRAY |
                         FORMAT_MESSAGE_FROM_STRING,
                         msg,
                         0, 0, (LPSTR) &lib->errmsg, 0, (va_list*) &arg);
    LocalFree(msg);
  }
 
  if (!res)
    uv__format_fallback_error(lib, errorno);
 
  return -1;
}

References arg(), DWORD, uv_lib_t::errmsg, ERROR_MUI_FILE_NOT_FOUND, msg, NULL, and uv__format_fallback_error().

Referenced by uv_dlopen(), and uv_dlsym().

uv__format_fallback_error()

static void uv__format_fallback_error ( uv_lib_t *  lib, int  errorno  )

static

Definition at line 78 of file dl.c.

                                                                 {
  static const CHAR fallback_error[] = "error: %1!d!";
  DWORD_PTR args[1];
  args[0] = (DWORD_PTR) errorno;
 
  FormatMessageA(FORMAT_MESSAGE_FROM_STRING |
                 FORMAT_MESSAGE_ARGUMENT_ARRAY |
                 FORMAT_MESSAGE_ALLOCATE_BUFFER,
                 fallback_error, 0, 0,
                 (LPSTR) &lib->errmsg,
                 0, (va_list*) args);
}

References args, and uv_lib_t::errmsg.

Referenced by uv__dlerror().

uv_dlclose()

void uv_dlclose

(

uv_lib_t *

lib

)

Definition at line 52 of file dl.c.

                               {
  if (lib->errmsg) {
    LocalFree((void*)lib->errmsg);
    lib->errmsg = NULL;
  }
 
  if (lib->handle) {
    /* Ignore errors. No good way to signal them without leaking memory. */
    FreeLibrary(lib->handle);
    lib->handle = NULL;
  }
}

References uv_lib_t::errmsg, uv_lib_t::handle, NULL, and uv__free().

uv_dlerror()

const char* uv_dlerror

(

const uv_lib_t *

lib

)

Definition at line 73 of file dl.c.

                                            {
  return lib->errmsg ? lib->errmsg : "no error";
}

References uv_lib_t::errmsg.

Referenced by main().

uv_dlopen()

int uv_dlopen	(	const char *	filename,
		uv_lib_t *	lib
	)

Definition at line 28 of file dl.c.

                                                   {
  WCHAR filename_w[32768];
 
  lib->handle = NULL;
  lib->errmsg = NULL;
 
  if (!MultiByteToWideChar(CP_UTF8,
                           0,
                           filename,
                           -1,
                           filename_w,
                           ARRAY_SIZE(filename_w))) {
    return uv__dlerror(lib, filename, GetLastError());
  }
 
  lib->handle = LoadLibraryExW(filename_w, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
  if (lib->handle == NULL) {
    return uv__dlerror(lib, filename, GetLastError());
  }
 
  return 0;
}

References ARRAY_SIZE, uv_lib_t::errmsg, uv_lib_t::handle, NULL, and uv__dlerror().

Referenced by main().

uv_dlsym()

int uv_dlsym	(	uv_lib_t *	lib,
		const char *	name,
		void **	ptr
	)

Definition at line 66 of file dl.c.

                                                          {
  /* Cast though integer to suppress pedantic warning about forbidden cast. */
  *ptr = (void*)(uintptr_t) GetProcAddress(lib->handle, name);
  return uv__dlerror(lib, "", *ptr ? 0 : GetLastError());
}

References uv_lib_t::handle, and uv__dlerror().

Referenced by main().