greenlet_compiler_compat.hpp

/* -*- indent-tabs-mode: nil; tab-width: 4; -*- */
#ifndef GREENLET_COMPILER_COMPAT_HPP
#define GREENLET_COMPILER_COMPAT_HPP
 
#include <cstdint>
 
#    define G_NO_COPIES_OF_CLS(Cls) private:     \
    Cls(const Cls& other) = delete; \
    Cls& operator=(const Cls& other) = delete
 
#    define G_NO_ASSIGNMENT_OF_CLS(Cls) private:  \
    Cls& operator=(const Cls& other) = delete
 
#    define G_NO_COPY_CONSTRUCTOR_OF_CLS(Cls) private: \
    Cls(const Cls& other) = delete;
 
 
// CAUTION: MSVC is stupidly picky:
//
// "The compiler ignores, without warning, any __declspec keywords
// placed after * or & and in front of the variable identifier in a
// declaration."
// (https://docs.microsoft.com/en-us/cpp/cpp/declspec?view=msvc-160)
//
// So pointer return types must be handled differently (because of the
// trailing *), or you get inscrutable compiler warnings like "error
// C2059: syntax error: ''"
//
// In C++ 11, there is a standard syntax for attributes, and
// GCC defines an attribute to use with this: [[gnu:noinline]].
// In the future, this is expected to become standard.
 
#if defined(__GNUC__) || defined(__clang__)
/* We used to check for GCC 4+ or 3.4+, but those compilers are
   laughably out of date. Just assume they support it. */
#    define GREENLET_NOINLINE(name) __attribute__((noinline)) name
#    define GREENLET_NOINLINE_P(rtype, name) rtype __attribute__((noinline)) name
#    define UNUSED(x) UNUSED_ ## x __attribute__((__unused__))
#elif defined(_MSC_VER)
/* We used to check for  && (_MSC_VER >= 1300) but that's also out of date. */
#    define GREENLET_NOINLINE(name) __declspec(noinline) name
#    define GREENLET_NOINLINE_P(rtype, name) __declspec(noinline) rtype name
#    define UNUSED(x) UNUSED_ ## x
#endif
 
#if defined(_MSC_VER)
#    define G_NOEXCEPT_WIN32 noexcept
#else
#    define G_NOEXCEPT_WIN32
#endif
 
#if defined(__GNUC__) && defined(__POWERPC__) && defined(__APPLE__)
// 32-bit PPC/MacOSX. Only known to be tested on unreleased versions
// of macOS 10.6 using a macports build gcc 14. It appears that
// running C++ destructors of thread-local variables is broken.
 
// See https://github.com/python-greenlet/greenlet/pull/419
#     define GREENLET_BROKEN_THREAD_LOCAL_CLEANUP_JUST_LEAK 1
#else
#     define GREENLET_BROKEN_THREAD_LOCAL_CLEANUP_JUST_LEAK 0
#endif
 
 
#endif