From 3be8c4714a7ff67e3a7a22d210caded3eec9c60f Mon Sep 17 00:00:00 2001
From: zhaodezan <zhaodezan@huawei.com>
Date: Fri, 7 May 2021 21:45:05 +0800
Subject: [PATCH] windows dlopen

---
 mindspore/lite/src/common/loader_util.cc      | 60 ++++++++++++++-----
 mindspore/lite/src/common/loader_util.h       |  8 +--
 .../lite/test/ut/src/loader_util_test.cc      |  8 +--
 3 files changed, 50 insertions(+), 26 deletions(-)

diff --git a/mindspore/lite/src/common/loader_util.cc b/mindspore/lite/src/common/loader_util.cc
index 582723ef3c..d2d24b3f08 100644
--- a/mindspore/lite/src/common/loader_util.cc
+++ b/mindspore/lite/src/common/loader_util.cc
@@ -18,43 +18,73 @@
 #include <string.h>
 #include <climits>
 #include "include/errorcode.h"
-#include "src/common/log_util.h"
-
 #ifndef _WIN32
+#include <dlfcn.h>
+#else
+#include <windows.h>
+#endif
+
+#define LOG_ERROR(content, args...) \
+  { printf("[ERROR] %s|%d|%s: " #content "\r\n", __FILE__, __LINE__, __func__, ##args); }
 
 namespace mindspore {
 namespace lite {
-int SoLoader::Open(const char *so_path, int mode) {
-  if ((strlen(so_path)) >= PATH_MAX) {
-    MS_LOG(ERROR) << "path is too long";
+int DynamicLibraryLoader::Open(const char *lib_path) {
+  if ((strlen(lib_path)) >= PATH_MAX) {
+    LOG_ERROR("path is too long");
     return RET_ERROR;
   }
   char resolved_path[PATH_MAX];
-  auto resolve_res = realpath(so_path, resolved_path);
-  if (resolve_res == nullptr) {
-    MS_LOG(ERROR) << "path not exist";
+
+#ifndef _WIN32
+  char *real_path = realpath(lib_path, resolved_path);
+#else
+  char *real_path = _fullpath(resolved_path, lib_path, 1024);
+#endif
+
+  if (real_path == nullptr) {
+    LOG_ERROR("path not exist");
     return RET_ERROR;
   }
-  handler_ = dlopen(so_path, mode);
+
+#ifndef _WIN32
+  handler_ = dlopen(lib_path, RTLD_LAZY);
+#else
+  handler_ = LoadLibrary(lib_path);
+#endif
+
   if (handler_ == nullptr) {
-    MS_LOG(ERROR) << "open path failed";
+    LOG_ERROR("open path failed");
     return RET_ERROR;
   }
   return RET_OK;
 }
 
-void *SoLoader::GetFunc(const char *func_name) { return dlsym(handler_, func_name); }
+void *DynamicLibraryLoader::GetFunc(const char *func_name) {
+#ifndef _WIN32
+  return dlsym(handler_, func_name);
+#else
+  auto func = GetProcAddress(reinterpret_cast<HINSTANCE__ *>(handler_), func_name);
+  return reinterpret_cast<void *>(func);
+#endif
+}
 
-int SoLoader::Close() {
+int DynamicLibraryLoader::Close() {
+#ifndef _WIN32
   auto close_res = dlclose(handler_);
   if (close_res != 0) {
-    MS_LOG(ERROR) << "can not close handler";
+    LOG_ERROR("can not close handler");
     return RET_ERROR;
   }
+#else
+  auto close_res = FreeLibrary(reinterpret_cast<HINSTANCE__ *>(handler_));
+  if (close_res == 0) {
+    LOG_ERROR("can not close handler");
+    return RET_ERROR;
+  }
+#endif
   return RET_OK;
 }
 
 }  // namespace lite
 }  // namespace mindspore
-
-#endif
diff --git a/mindspore/lite/src/common/loader_util.h b/mindspore/lite/src/common/loader_util.h
index 2c01424d41..ac2458ea4f 100644
--- a/mindspore/lite/src/common/loader_util.h
+++ b/mindspore/lite/src/common/loader_util.h
@@ -17,15 +17,12 @@
 #ifndef MINDSPORE_LITE_SRC_COMMON_LOADER_UTIL_H_
 #define MINDSPORE_LITE_SRC_COMMON_LOADER_UTIL_H_
 
-#ifndef _WIN32
-#include <dlfcn.h>
-
 namespace mindspore {
 namespace lite {
 
-class SoLoader {
+class DynamicLibraryLoader {
  public:
-  int Open(const char *so_path, int mode = RTLD_LAZY);
+  int Open(const char *lib_path);
   void *GetFunc(const char *func_name);
   int Close();
 
@@ -37,4 +34,3 @@ class SoLoader {
 }  // namespace mindspore
 
 #endif
-#endif
diff --git a/mindspore/lite/test/ut/src/loader_util_test.cc b/mindspore/lite/test/ut/src/loader_util_test.cc
index 13c3d95531..8112652cfa 100644
--- a/mindspore/lite/test/ut/src/loader_util_test.cc
+++ b/mindspore/lite/test/ut/src/loader_util_test.cc
@@ -24,7 +24,7 @@ class LoaderUtilTest : public mindspore::CommonTest {
 };
 
 /*
- in file add.cc, the code is:
+ in file add.c, the code is:
  int add(int a, int b) {return a + b;}
  use this command to generate so file:
  gcc add.cc -fPIC -shared -o libadd.so
@@ -32,14 +32,12 @@ class LoaderUtilTest : public mindspore::CommonTest {
  nm -D libadd.so
 */
 TEST_F(LoaderUtilTest, TestAdd) {
-#ifndef _WIN32
-  lite::SoLoader loader;
+  lite::DynamicLibraryLoader loader;
   loader.Open("./libadd.so");
   int (*add)(int a, int b);
-  add = (int (*)(int, int))loader.GetFunc("_Z3addii");
+  add = (int (*)(int, int))loader.GetFunc("add");
   int res = add(7, 8);
   loader.Close();
   ASSERT_EQ(15, res);
-#endif
 }
 }  // namespace mindspore