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 std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
39 std::wstring wideBuffer = converter.from_bytes(libraryName);
40
41 switch (searchType)
42 {
43 case SearchType::ApplicationDir:
44 mModule = LoadPackagedLibrary(wideBuffer.c_str(), 0);
45 break;
46 case SearchType::SystemDir:
47 // Not supported in UWP
48 break;
49 }
50 }
51
~UwpLibrary()52 ~UwpLibrary() override
53 {
54 if (mModule)
55 {
56 FreeLibrary(mModule);
57 }
58 }
59
getSymbol(const char * symbolName)60 void *getSymbol(const char *symbolName) override
61 {
62 if (!mModule)
63 {
64 return nullptr;
65 }
66
67 return reinterpret_cast<void *>(GetProcAddress(mModule, symbolName));
68 }
69
getNative() const70 void *getNative() const override { return reinterpret_cast<void *>(mModule); }
71
72 private:
73 HMODULE mModule = nullptr;
74 };
75
OpenSharedLibrary(const char * libraryName,SearchType searchType)76 Library *OpenSharedLibrary(const char *libraryName, SearchType searchType)
77 {
78 char buffer[MAX_PATH];
79 int ret = snprintf(buffer, MAX_PATH, "%s.%s", libraryName, GetSharedLibraryExtension());
80
81 if (ret > 0 && ret < MAX_PATH)
82 {
83 return new UwpLibrary(buffer, searchType);
84 }
85 else
86 {
87 fprintf(stderr, "Error loading shared library: 0x%x", ret);
88 return nullptr;
89 }
90 }
91
OpenSharedLibraryWithExtension(const char * libraryName)92 Library *OpenSharedLibraryWithExtension(const char *libraryName)
93 {
94 // SystemDir is not implemented in UWP.
95 fprintf(stderr, "Error loading shared library with extension.\n");
96 return nullptr;
97 }
98 } // namespace angle
99