#include <pslang/jit/executable.hpp>

#include <stdexcept>
#include <system_error>

#ifdef __linux__
#include <sys/mman.h>
#endif

#ifdef __APPLE__
#include <sys/mman.h>
#endif

namespace pslang::jit
{

	blob make_host_executable(std::vector<std::uint8_t> const & code)
	{
#if defined(__linux__) || defined(__APPLE__)
		auto size = code.size();
		auto ptr = (std::uint8_t *)mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
		if (ptr == MAP_FAILED)
			throw std::system_error(errno, std::generic_category());
		std::copy(code.begin(), code.end(), ptr);
		if (mprotect(ptr, size, PROT_READ | PROT_EXEC) != 0)
			throw std::system_error(errno, std::generic_category());
		return blob(std::shared_ptr<std::uint8_t>(ptr, [size](void * ptr){ munmap(ptr, size); }), size);
#else
		throw std::runtime_error("Host-executable modules are not supported for this platform");
#endif
	}

}