1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980 |
- //
- // Copyright (c) 2017 James E. King III
- //
- // Distributed under the Boost Software License, Version 1.0.
- // (See accompanying file LICENSE_1_0.txt or copy at
- // https://www.boost.org/LICENSE_1_0.txt)
- //
- // Platform-specific random entropy provider platform detection
- //
- #ifndef BOOST_UUID_DETAIL_RANDOM_PROVIDER_PLATFORM_DETECTION_HPP
- #define BOOST_UUID_DETAIL_RANDOM_PROVIDER_PLATFORM_DETECTION_HPP
- #include <boost/predef/library/c/cloudabi.h>
- #include <boost/predef/library/c/gnu.h>
- #include <boost/predef/os/bsd/open.h>
- #include <boost/predef/os/windows.h>
- // Note: Don't use Boost.Predef to detect Linux and Android as it may give different results depending on header inclusion order.
- // https://github.com/boostorg/predef/issues/81#issuecomment-413329061
- #if (defined(__linux__) || defined(__linux) || defined(linux)) && (!defined(__ANDROID__) || __ANDROID_API__ >= 28)
- #include <sys/syscall.h>
- #if defined(SYS_getrandom)
- #define BOOST_UUID_RANDOM_PROVIDER_HAS_GETRANDOM
- #endif // defined(SYS_getrandom)
- #endif
- // On Linux, getentropy is implemented via getrandom. If we know that getrandom is not supported by the kernel, getentropy
- // will certainly not work, even if libc provides a wrapper function for it. There is no reason, ever, to use getentropy on that platform.
- #if !defined(BOOST_UUID_RANDOM_PROVIDER_DISABLE_GETENTROPY) && (defined(__linux__) || defined(__linux) || defined(linux) || defined(__ANDROID__))
- #define BOOST_UUID_RANDOM_PROVIDER_DISABLE_GETENTROPY
- #endif
- //
- // Platform Detection - will load in the correct header and
- // will define the class <tt>random_provider_base</tt>.
- //
- #if BOOST_OS_BSD_OPEN >= BOOST_VERSION_NUMBER(2, 1, 0) || BOOST_LIB_C_CLOUDABI
- # define BOOST_UUID_RANDOM_PROVIDER_ARC4RANDOM
- # define BOOST_UUID_RANDOM_PROVIDER_NAME arc4random
- #elif BOOST_OS_WINDOWS
- # include <boost/winapi/config.hpp>
- # if BOOST_WINAPI_PARTITION_APP_SYSTEM && \
- !defined(BOOST_UUID_RANDOM_PROVIDER_FORCE_WINCRYPT) && \
- !defined(_WIN32_WCE) && \
- (BOOST_USE_WINAPI_VERSION >= BOOST_WINAPI_VERSION_WIN6)
- # define BOOST_UUID_RANDOM_PROVIDER_BCRYPT
- # define BOOST_UUID_RANDOM_PROVIDER_NAME bcrypt
- # elif BOOST_WINAPI_PARTITION_DESKTOP || BOOST_WINAPI_PARTITION_SYSTEM
- # define BOOST_UUID_RANDOM_PROVIDER_WINCRYPT
- # define BOOST_UUID_RANDOM_PROVIDER_NAME wincrypt
- # else
- # error Unable to find a suitable windows entropy provider
- # endif
- #elif defined(BOOST_UUID_RANDOM_PROVIDER_HAS_GETRANDOM) && !defined(BOOST_UUID_RANDOM_PROVIDER_FORCE_POSIX) && !defined(BOOST_UUID_RANDOM_PROVIDER_DISABLE_GETRANDOM)
- # define BOOST_UUID_RANDOM_PROVIDER_GETRANDOM
- # define BOOST_UUID_RANDOM_PROVIDER_NAME getrandom
- #elif BOOST_LIB_C_GNU >= BOOST_VERSION_NUMBER(2, 25, 0) && !defined(BOOST_UUID_RANDOM_PROVIDER_FORCE_POSIX) && !defined(BOOST_UUID_RANDOM_PROVIDER_DISABLE_GETENTROPY)
- # define BOOST_UUID_RANDOM_PROVIDER_GETENTROPY
- # define BOOST_UUID_RANDOM_PROVIDER_NAME getentropy
- #else
- # define BOOST_UUID_RANDOM_PROVIDER_POSIX
- # define BOOST_UUID_RANDOM_PROVIDER_NAME posix
- #endif
- #define BOOST_UUID_RANDOM_PROVIDER_STRINGIFY2(X) #X
- #define BOOST_UUID_RANDOM_PROVIDER_STRINGIFY(X) BOOST_UUID_RANDOM_PROVIDER_STRINGIFY2(X)
- #if defined(BOOST_UUID_RANDOM_PROVIDER_SHOW)
- #pragma message("BOOST_UUID_RANDOM_PROVIDER_NAME " BOOST_UUID_RANDOM_PROVIDER_STRINGIFY(BOOST_UUID_RANDOM_PROVIDER_NAME))
- #endif
- #endif // BOOST_UUID_DETAIL_RANDOM_PROVIDER_PLATFORM_DETECTION_HPP
|