65bae5a341
Will be compiled and used in the next commit. Co-authored-by: Rémi Verschelde <rverschelde@gmail.com>
110 lines
3.7 KiB
C++
110 lines
3.7 KiB
C++
/*
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** Copyright (c) 2017-2022, The Khronos Group Inc.
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**
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** SPDX-License-Identifier: Apache-2.0 OR MIT
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*/
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#ifndef OPENXR_PLATFORM_DEFINES_H_
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#define OPENXR_PLATFORM_DEFINES_H_ 1
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Platform-specific calling convention macros.
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*
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* Platforms should define these so that OpenXR clients call OpenXR functions
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* with the same calling conventions that the OpenXR implementation expects.
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*
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* XRAPI_ATTR - Placed before the return type in function declarations.
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* Useful for C++11 and GCC/Clang-style function attribute syntax.
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* XRAPI_CALL - Placed after the return type in function declarations.
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* Useful for MSVC-style calling convention syntax.
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* XRAPI_PTR - Placed between the '(' and '*' in function pointer types.
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*
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* Function declaration: XRAPI_ATTR void XRAPI_CALL xrFunction(void);
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* Function pointer type: typedef void (XRAPI_PTR *PFN_xrFunction)(void);
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*/
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#if defined(_WIN32)
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#define XRAPI_ATTR
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// On Windows, functions use the stdcall convention
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#define XRAPI_CALL __stdcall
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#define XRAPI_PTR XRAPI_CALL
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#elif defined(__ANDROID__) && defined(__ARM_ARCH) && __ARM_ARCH < 7
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#error "API not supported for the 'armeabi' NDK ABI"
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#elif defined(__ANDROID__) && defined(__ARM_ARCH) && __ARM_ARCH >= 7 && defined(__ARM_32BIT_STATE)
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// On Android 32-bit ARM targets, functions use the "hardfloat"
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// calling convention, i.e. float parameters are passed in registers. This
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// is true even if the rest of the application passes floats on the stack,
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// as it does by default when compiling for the armeabi-v7a NDK ABI.
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#define XRAPI_ATTR __attribute__((pcs("aapcs-vfp")))
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#define XRAPI_CALL
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#define XRAPI_PTR XRAPI_ATTR
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#else
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// On other platforms, use the default calling convention
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#define XRAPI_ATTR
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#define XRAPI_CALL
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#define XRAPI_PTR
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#endif
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#include <stddef.h>
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#if !defined(XR_NO_STDINT_H)
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#if defined(_MSC_VER) && (_MSC_VER < 1600)
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typedef signed __int8 int8_t;
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typedef unsigned __int8 uint8_t;
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typedef signed __int16 int16_t;
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typedef unsigned __int16 uint16_t;
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typedef signed __int32 int32_t;
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typedef unsigned __int32 uint32_t;
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typedef signed __int64 int64_t;
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typedef unsigned __int64 uint64_t;
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#else
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#include <stdint.h>
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#endif
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#endif // !defined( XR_NO_STDINT_H )
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// XR_PTR_SIZE (in bytes)
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#if (defined(__LP64__) || defined(_WIN64) || (defined(__x86_64__) && !defined(__ILP32__) ) || defined(_M_X64) || defined(__ia64) || defined (_M_IA64) || defined(__aarch64__) || defined(__powerpc64__))
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#define XR_PTR_SIZE 8
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#else
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#define XR_PTR_SIZE 4
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#endif
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// Needed so we can use clang __has_feature portably.
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#if !defined(XR_COMPILER_HAS_FEATURE)
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#if defined(__clang__)
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#define XR_COMPILER_HAS_FEATURE(x) __has_feature(x)
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#else
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#define XR_COMPILER_HAS_FEATURE(x) 0
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#endif
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#endif
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// Identifies if the current compiler has C++11 support enabled.
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// Does not by itself identify if any given C++11 feature is present.
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#if !defined(XR_CPP11_ENABLED) && defined(__cplusplus)
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#if defined(__GNUC__) && defined(__GXX_EXPERIMENTAL_CXX0X__)
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#define XR_CPP11_ENABLED 1
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#elif defined(_MSC_VER) && (_MSC_VER >= 1600)
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#define XR_CPP11_ENABLED 1
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#elif (__cplusplus >= 201103L) // 201103 is the first C++11 version.
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#define XR_CPP11_ENABLED 1
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#endif
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#endif
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// Identifies if the current compiler supports C++11 nullptr.
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#if !defined(XR_CPP_NULLPTR_SUPPORTED)
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#if defined(XR_CPP11_ENABLED) && \
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((defined(__clang__) && XR_COMPILER_HAS_FEATURE(cxx_nullptr)) || \
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(defined(__GNUC__) && (((__GNUC__ * 1000) + __GNUC_MINOR__) >= 4006)) || \
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(defined(_MSC_VER) && (_MSC_VER >= 1600)) || \
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(defined(__EDG_VERSION__) && (__EDG_VERSION__ >= 403)))
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#define XR_CPP_NULLPTR_SUPPORTED 1
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#endif
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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