1 //
2 // Copyright 2019 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
5 //
6
7 // system_utils_winuwp.cpp: Implementation of OS-specific functions for Windows UWP
8
9 #include "system_utils.h"
10
11 #include <stdarg.h>
12 #include <windows.h>
13 #include <array>
14 #include <codecvt>
15 #include <locale>
16 #include <string>
17
18 namespace angle
19 {
20
SetEnvironmentVar(const char * variableName,const char * value)21 bool SetEnvironmentVar(const char *variableName, const char *value)
22 {
23 // Not supported for UWP
24 return false;
25 }
26
GetEnvironmentVar(const char * variableName)27 std::string GetEnvironmentVar(const char *variableName)
28 {
29 // Not supported for UWP
30 return "";
31 }
32
33 class UwpLibrary : public Library
34 {
35 public:
UwpLibrary(const char * libraryName,SearchType searchType)36 UwpLibrary(const char *libraryName, SearchType searchType)
37 {
38 char buffer[MAX_PATH];
39 int ret = snprintf(buffer, MAX_PATH, "%s.%s", libraryName, GetSharedLibraryExtension());
40
41 std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
42 std::wstring wideBuffer = converter.from_bytes(buffer);
43
44 if (ret > 0 && ret < MAX_PATH)
45 {
46 switch (searchType)
47 {
48 case SearchType::ApplicationDir:
49 mModule = LoadPackagedLibrary(wideBuffer.c_str(), 0);
50 break;
51 case SearchType::SystemDir:
52 // Not supported in UWP
53 break;
54 }
55 }
56 }
57
~UwpLibrary()58 ~UwpLibrary() override
59 {
60 if (mModule)
61 {
62 FreeLibrary(mModule);
63 }
64 }
65
getSymbol(const char * symbolName)66 void *getSymbol(const char *symbolName) override
67 {
68 if (!mModule)
69 {
70 return nullptr;
71 }
72
73 return reinterpret_cast<void *>(GetProcAddress(mModule, symbolName));
74 }
75
getNative() const76 void *getNative() const override { return reinterpret_cast<void *>(mModule); }
77
78 private:
79 HMODULE mModule = nullptr;
80 };
81
OpenSharedLibrary(const char * libraryName,SearchType searchType)82 Library *OpenSharedLibrary(const char *libraryName, SearchType searchType)
83 {
84 return new UwpLibrary(libraryName, searchType);
85 }
86 } // namespace angle
87