create a C/C++ plugin system for pybullet / C-API.

examples/SharedMemory/plugins/b3PluginAPI.h

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+#ifndef B3_PLUGIN_API_H
+#define B3_PLUGIN_API_H
+
+#ifdef _WIN32
+#define B3_SHARED_API __declspec(dllexport)
+#elif defined (__GNUC__)
+#define B3_SHARED_API __attribute__((visibility("default")))
+#else
+#define B3_SHARED_API
+#endif
+
+
+#if defined(_WIN32)
+#define B3_API_ENTRY
+#define B3_API_CALL     __stdcall
+#define B3_CALLBACK     __stdcall
+#else
+#define B3_API_ENTRY
+#define B3_API_CALL
+#define B3_CALLBACK
+#endif
+
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+	/* Plugin API */
+	typedef B3_API_ENTRY int (B3_API_CALL * PFN_INIT)();
+	typedef B3_API_ENTRY void (B3_API_CALL * PFN_EXIT)();
+	typedef B3_API_ENTRY int (B3_API_CALL * PFN_EXECUTE)();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //B3_PLUGIN_API_H

examples/SharedMemory/plugins/testPlugin/premake4.lua

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+		
+
+project ("pybullet_testplugin")
+		language "C++"
+		kind "SharedLib"
+		
+		includedirs {".","../../../../src", "../../../../examples",
+		"../../../ThirdPartyLibs"}
+		defines {"PHYSICS_IN_PROCESS_EXAMPLE_BROWSER"}
+	hasCL = findOpenCL("clew")
+
+	links{"BulletFileLoader", "Bullet3Common", "LinearMath"}
+
+
+	if os.is("MacOSX") then
+--		targetextension {"so"}
+		links{"Cocoa.framework","Python"}
+	end
+
+
+		files {
+			"testplugin.cpp",
+			"../../PhysicsClient.cpp",
+			"../../PhysicsClient.h",
+			"../../PhysicsClientSharedMemory.cpp",
+			"../../PhysicsClientSharedMemory.h",
+			"../../PhysicsClientSharedMemory_C_API.cpp",
+			"../../PhysicsClientSharedMemory_C_API.h",
+			"../../PhysicsClientC_API.cpp",
+			"../../PhysicsClientC_API.h",
+			"../../Win32SharedMemory.cpp",
+			"../../Win32SharedMemory.h",
+			"../../PosixSharedMemory.cpp",
+			"../../PosixSharedMemory.h",
+			"../../../Utils/b3Clock.cpp",
+			"../../../Utils/b3Clock.h",
+			"../../../Utils/b3ResourcePath.cpp",
+			"../../../Utils/b3ResourcePath.h",
+				}
+	
+	
+	

examples/SharedMemory/plugins/testPlugin/testplugin.cpp

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+
+#include "testplugin.h"
+#include "../../SharedMemoryPublic.h"
+
+#include <stdio.h>
+
+B3_SHARED_API int initPlugin()
+{
+	printf("hi!\n");
+	return SHARED_MEMORY_MAGIC_NUMBER;
+}
+
+B3_SHARED_API int executePluginCommand()
+{
+	return 42;
+}
+
+
+B3_SHARED_API void exitPlugin()
+{
+	printf("bye!\n");
+}

examples/SharedMemory/plugins/testPlugin/testplugin.h

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+#ifndef TEST_PLUGIN_H
+#define TEST_PLUGIN_H
+
+#include "../b3PluginAPI.h"
+
+#ifdef __cplusplus
+extern "C" 
+{
+#endif
+
+B3_SHARED_API int initPlugin();
+B3_SHARED_API void exitPlugin();
+B3_SHARED_API int executePluginCommand();
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif//#define TEST_PLUGIN_H