初始化

LFtid1056/lib/libuv-v1.51.0/src/win/dl.c

@@ -0,0 +1,135 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * 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 "uv.h"
+#include "internal.h"
+
+static int uv__dlerror(uv_lib_t* lib, const char* filename, DWORD errorno);
+
+
+int uv_dlopen(const char* filename, uv_lib_t* lib) {
+  WCHAR filename_w[32768];
+  ssize_t r;
+
+  lib->handle = NULL;
+  lib->errmsg = NULL;
+
+  r = uv_wtf8_length_as_utf16(filename);
+  if (r < 0)
+    return uv__dlerror(lib, filename, ERROR_NO_UNICODE_TRANSLATION);
+  if ((size_t) r > ARRAY_SIZE(filename_w))
+    return uv__dlerror(lib, filename, ERROR_INSUFFICIENT_BUFFER);
+  uv_wtf8_to_utf16(filename, filename_w, r);
+
+  lib->handle = LoadLibraryExW(filename_w, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
+  if (lib->handle == NULL) {
+    return uv__dlerror(lib, filename, GetLastError());
+  }
+
+  return 0;
+}
+
+
+void uv_dlclose(uv_lib_t* lib) {
+  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;
+  }
+}
+
+
+int uv_dlsym(uv_lib_t* lib, const char* name, void** ptr) {
+  /* 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());
+}
+
+
+const char* uv_dlerror(const uv_lib_t* lib) {
+  return lib->errmsg ? lib->errmsg : "no error";
+}
+
+
+static void uv__format_fallback_error(uv_lib_t* lib, int errorno){
+  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);
+}
+
+
+
+static int uv__dlerror(uv_lib_t* lib, const char* filename, DWORD errorno) {
+  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;
+}