Add DynamicLib

Src/IACore/CMakeLists.txt

@@ -3,3 +3,7 @@ add_library(IACore STATIC imp/cpp/dummy.cpp)
 
 target_include_directories(IACore PUBLIC inc/hpp imp/inl)
 target_compile_definitions(IACore PUBLIC _CRT_SECURE_NO_WARNINGS)
+
+if(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR CMAKE_SYSTEM_NAME STREQUAL "Android")
+    target_link_libraries(IACore PUBLIC dl)
+endif()

Src/IACore/inc/hpp/IACore/DynamicLib.hpp

@@ -0,0 +1,108 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2024 IAS (ias@iasoft.dev)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <IACore/Exception.hpp>
+#include <IACore/String.hpp>
+
+#if defined(_WIN32)
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
+#elif defined(__linux__) || defined(__APPLE__)
+#include <dlfcn.h>
+#endif
+
+namespace ia
+{
+    class DynamicLib
+    {
+      public:
+        STATIC INLINE DynamicLib Load(IN CONST String &searchPath, IN CONST String &name);
+
+        INLINE ~DynamicLib();
+
+      public:
+        INLINE PVOID GetSymbol(IN CONST String &name);
+
+        template<typename FunctionType> FunctionType GetFunction(IN CONST String &name)
+        {
+            return reinterpret_cast<FunctionType *>(GetSymbol(name));
+        }
+
+      private:
+        INLINE DynamicLib(IN PVOID moduleHandle);
+
+      private:
+        CONST PVOID m_moduleHandle;
+    };
+} // namespace ia
+
+namespace ia
+{
+    DynamicLib::DynamicLib(IN PVOID moduleHandle) : m_moduleHandle(moduleHandle)
+    {
+    }
+
+#if defined(_WIN32)
+    DynamicLib DynamicLib::Load(IN CONST String &searchPath, IN CONST String &name)
+    {
+        const auto handle = LoadLibraryA(BuildString(searchPath, "/", name, ".dll").c_str());
+        if (handle == NULL)
+            THROW_UNKNOWN("DynamicLib: Failed to load the library \"", name, "\" with error: ", GetLastError());
+        return DynamicLib((PVOID) handle);
+    }
+
+    DynamicLib::~DynamicLib()
+    {
+        if (m_moduleHandle)
+            FreeLibrary(static_cast<HMODULE>(m_moduleHandle));
+    }
+
+    PVOID DynamicLib::GetSymbol(IN CONST String &name)
+    {
+        const auto symbol = GetProcAddress(static_cast<HMODULE>(m_moduleHandle), name.c_str());
+        if (symbol == NULL)
+            THROW_UNKNOWN("DynamicLib: Failed to find the symbol \"", name, "\" with error: ", GetLastError());
+        return (PVOID) symbol;
+    }
+#else
+    DynamicLib DynamicLib::Load(IN CONST String &searchPath, IN CONST String &name)
+    {
+        dlerror();
+        const auto handle = dlopen(BuildString(searchPath, "/", name, ".so").c_str(), RTLD_LAZY);
+        if (handle == NULL)
+            THROW_UNKNOWN("DynamicLib: Failed to load the library \"", name, "\" with error: ", dlerror());
+        return DynamicLib((PVOID) handle);
+    }
+
+    DynamicLib::~DynamicLib()
+    {
+        if (m_moduleHandle)
+            dlclose(m_moduleHandle);
+    }
+
+    PVOID DynamicLib::GetSymbol(IN CONST String &name)
+    {
+        dlerror();
+        const auto symbol = dlsym(handle, name.c_str());
+        const char *dlsym_error = dlerror();
+        if (dlsym_error)
+            THROW_UNKNOWN("DynamicLib: Failed to find the symbol \"", name, "\" with error: ", dlerror());
+        return (PVOID)symbol;
+    }
+#endif
+} // namespace ia

Src/IACoreTest/imp/cpp/Main.cpp

@@ -7,6 +7,8 @@
 #include <IACore/Process.hpp>
 #include <IACore/Environment.hpp>
 
+#include <IACore/DynamicLib.hpp>
+
 using namespace ia;
 
 template<typename _value_type> VOID print(IN CONST Span<_value_type> &s)