diff options
Diffstat (limited to 'libcxx/test/std/atomics/atomics.lockfree/isalwayslockfree.pass.cpp')
| -rw-r--r-- | libcxx/test/std/atomics/atomics.lockfree/isalwayslockfree.pass.cpp | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/libcxx/test/std/atomics/atomics.lockfree/isalwayslockfree.pass.cpp b/libcxx/test/std/atomics/atomics.lockfree/isalwayslockfree.pass.cpp new file mode 100644 index 00000000000..5577a72528b --- /dev/null +++ b/libcxx/test/std/atomics/atomics.lockfree/isalwayslockfree.pass.cpp @@ -0,0 +1,101 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// UNSUPPORTED: libcpp-has-no-threads, c++98, c++03, c++11, c++14 + +// <atomic> + +// static constexpr bool is_always_lock_free; + +#include <atomic> +#include <cassert> + +#if !defined(__cpp_lib_atomic_is_always_lock_free) +# error Feature test macro missing. +#endif + +template <typename T> void checkAlwaysLockFree() { + if (std::atomic<T>::is_always_lock_free) + assert(std::atomic<T>().is_lock_free()); +} + +int main() +{ +// structs and unions can't be defined in the template invocation. +// Work around this with a typedef. +#define CHECK_ALWAYS_LOCK_FREE(T) \ + do { \ + typedef T type; \ + checkAlwaysLockFree<type>(); \ + } while (0) + + CHECK_ALWAYS_LOCK_FREE(bool); + CHECK_ALWAYS_LOCK_FREE(char); + CHECK_ALWAYS_LOCK_FREE(signed char); + CHECK_ALWAYS_LOCK_FREE(unsigned char); + CHECK_ALWAYS_LOCK_FREE(char16_t); + CHECK_ALWAYS_LOCK_FREE(char32_t); + CHECK_ALWAYS_LOCK_FREE(wchar_t); + CHECK_ALWAYS_LOCK_FREE(short); + CHECK_ALWAYS_LOCK_FREE(unsigned short); + CHECK_ALWAYS_LOCK_FREE(int); + CHECK_ALWAYS_LOCK_FREE(unsigned int); + CHECK_ALWAYS_LOCK_FREE(long); + CHECK_ALWAYS_LOCK_FREE(unsigned long); + CHECK_ALWAYS_LOCK_FREE(long long); + CHECK_ALWAYS_LOCK_FREE(unsigned long long); + CHECK_ALWAYS_LOCK_FREE(std::nullptr_t); + CHECK_ALWAYS_LOCK_FREE(void*); + CHECK_ALWAYS_LOCK_FREE(float); + CHECK_ALWAYS_LOCK_FREE(double); + CHECK_ALWAYS_LOCK_FREE(long double); + CHECK_ALWAYS_LOCK_FREE(int __attribute__((vector_size(1 * sizeof(int))))); + CHECK_ALWAYS_LOCK_FREE(int __attribute__((vector_size(2 * sizeof(int))))); + CHECK_ALWAYS_LOCK_FREE(int __attribute__((vector_size(4 * sizeof(int))))); + CHECK_ALWAYS_LOCK_FREE(int __attribute__((vector_size(16 * sizeof(int))))); + CHECK_ALWAYS_LOCK_FREE(int __attribute__((vector_size(32 * sizeof(int))))); + CHECK_ALWAYS_LOCK_FREE(float __attribute__((vector_size(1 * sizeof(float))))); + CHECK_ALWAYS_LOCK_FREE(float __attribute__((vector_size(2 * sizeof(float))))); + CHECK_ALWAYS_LOCK_FREE(float __attribute__((vector_size(4 * sizeof(float))))); + CHECK_ALWAYS_LOCK_FREE(float __attribute__((vector_size(16 * sizeof(float))))); + CHECK_ALWAYS_LOCK_FREE(float __attribute__((vector_size(32 * sizeof(float))))); + CHECK_ALWAYS_LOCK_FREE(double __attribute__((vector_size(1 * sizeof(double))))); + CHECK_ALWAYS_LOCK_FREE(double __attribute__((vector_size(2 * sizeof(double))))); + CHECK_ALWAYS_LOCK_FREE(double __attribute__((vector_size(4 * sizeof(double))))); + CHECK_ALWAYS_LOCK_FREE(double __attribute__((vector_size(16 * sizeof(double))))); + CHECK_ALWAYS_LOCK_FREE(double __attribute__((vector_size(32 * sizeof(double))))); + CHECK_ALWAYS_LOCK_FREE(struct{}); + CHECK_ALWAYS_LOCK_FREE(struct{ int i; }); + CHECK_ALWAYS_LOCK_FREE(struct{ int i[2]; }); + CHECK_ALWAYS_LOCK_FREE(struct{ long long int i[2]; }); + CHECK_ALWAYS_LOCK_FREE(struct{ long long int i[4]; }); + CHECK_ALWAYS_LOCK_FREE(struct{ long long int i[8]; }); + CHECK_ALWAYS_LOCK_FREE(struct{ long long int i[16]; }); + CHECK_ALWAYS_LOCK_FREE(struct{ char c; /* padding */ long long int i; }); + CHECK_ALWAYS_LOCK_FREE(union{ int i; float f; }); + + // C macro and static constexpr must be consistent. + static_assert(std::atomic<bool>::is_always_lock_free == (2 == ATOMIC_BOOL_LOCK_FREE)); + static_assert(std::atomic<char>::is_always_lock_free == (2 == ATOMIC_CHAR_LOCK_FREE)); + static_assert(std::atomic<signed char>::is_always_lock_free == (2 == ATOMIC_CHAR_LOCK_FREE)); + static_assert(std::atomic<unsigned char>::is_always_lock_free == (2 == ATOMIC_CHAR_LOCK_FREE)); + static_assert(std::atomic<char16_t>::is_always_lock_free == (2 == ATOMIC_CHAR16_T_LOCK_FREE)); + static_assert(std::atomic<char32_t>::is_always_lock_free == (2 == ATOMIC_CHAR32_T_LOCK_FREE)); + static_assert(std::atomic<wchar_t>::is_always_lock_free == (2 == ATOMIC_WCHAR_T_LOCK_FREE)); + static_assert(std::atomic<short>::is_always_lock_free == (2 == ATOMIC_SHORT_LOCK_FREE)); + static_assert(std::atomic<unsigned short>::is_always_lock_free == (2 == ATOMIC_SHORT_LOCK_FREE)); + static_assert(std::atomic<int>::is_always_lock_free == (2 == ATOMIC_INT_LOCK_FREE)); + static_assert(std::atomic<unsigned int>::is_always_lock_free == (2 == ATOMIC_INT_LOCK_FREE)); + static_assert(std::atomic<long>::is_always_lock_free == (2 == ATOMIC_LONG_LOCK_FREE)); + static_assert(std::atomic<unsigned long>::is_always_lock_free == (2 == ATOMIC_LONG_LOCK_FREE)); + static_assert(std::atomic<long long>::is_always_lock_free == (2 == ATOMIC_LLONG_LOCK_FREE)); + static_assert(std::atomic<unsigned long long>::is_always_lock_free == (2 == ATOMIC_LLONG_LOCK_FREE)); + static_assert(std::atomic<void*>::is_always_lock_free == (2 == ATOMIC_POINTER_LOCK_FREE)); + static_assert(std::atomic<std::nullptr_t>::is_always_lock_free == (2 == ATOMIC_POINTER_LOCK_FREE)); +} |
