mr4th-dynamic-linking/xlist/base.h

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// baby context cracking
#if defined(_WIN32)
# define OS_WINDOWS 1
#elif defined(__gnu_linux__)
# define OS_LINUX 1
#else
# error this configuration of compiler & OS is not supported
#endif
#if !defined(OS_WINDOWS)
# define OS_WINDOWS 0
#endif
#if !defined(OS_LINUX)
# define OS_LINUX 0
#endif
// linkage keyword abstraction
#if OS_WINDOWS
# define EXPORT_SYMBOL __declspec(dllexport)
#elif OS_LINUX
# define EXPORT_SYMBOL __attribute__ ((visibility ("default")))
#else
# error keyword abstractions missing for this OS
#endif
#if OS_WINDOWS
# pragma section(".CRT$XCU", read)
# define BEFORE_MAIN(n) extern void n(void); \
__declspec(allocate(".CRT$XCU")) void (*n##__)(void) = n; \
__pragma(comment(linker, "/include:" #n)) extern void n(void)
#elif OS_LINUX
# define BEFORE_MAIN(n) \
__attribute__((constructor)) static void n(void)
#else
# error BEFORE_MAIN missing for this OS
#endif
// base layer types
typedef void BASE_Library;
// base symbols shared
#if defined(BASE_IMPLEMENTOR)
void base_func(void);
#endif
// dynamic function linkage protocol
typedef struct BASE_Funcs{
#define X(N,R,P) R (*N) P;
#include "base.xlist.h"
#undef X
} BASE_Funcs;
typedef BASE_Funcs* BASE_ExportFuncs(void);
#if defined(BASE_IMPLEMENTOR)
EXPORT_SYMBOL BASE_Funcs* base_export_functions(void);
#endif
#if !defined(BASE_IMPLEMENTOR)
#define X(N,R,P) R (*N) P = 0;
#include "base.xlist.h"
#undef X
#endif