Note In Boost. Control library auto-linking on Windows. In addition to these standard macros, Boost. Informally speaking, prevents all preceding memory operations to be reordered past this point. When defined, the library assumes the target CPU does not support mfence instruction used to implement thread fences. This static boolean constant indicates if any atomic object of this type is lock-free. The class implements the following operations:. Feature testing macros. Change bit number n in the variable to the opposite value, returning true if the bit was previously set to 1 and false otherwise. Subtract v from variable, returning true if the result is non-zero and false otherwise.
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When defined, the library assumes the target CPU does not support cmpxchg8b instruction used to support bit atomic operations. This is the case with very.
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This feature is not actually released yet: it appears to be in 'trunk' only. You can use a command line grep -R BOOST_ATOMIC_INT_LOCK_FREE boost/. 4 days ago std::atomic_int_least64_t, std::atomicint_least64_t>. defect reports were applied retroactively to previously published C++ standards.
Perform acquire operation. See the discussion below.
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This is mostly used for testing and should not be used in real world projects. Perform release operation. This is mostly used for testing and should not be used in real world projects.
boost-atomicfcx86_ html, Run-time component of boost atomic library, Fedora Rawhide for x86_ #include boost/atomic/> #include boost/atomic/detail/type- > #include typedef atomicint64_t >, boost::atomic_int64_t. Jul 16, boost:: atomics::detail::gcc_dcas_x86_64 DCAS; const volatile.
Initialize to an unspecified value.
This is the case with very old CPUs pre-Pentium. If defined, the library assumes dynamic linking, otherwise static.
Apply bit-wise "xor" with v to variable, returning true if the result is non-zero and false otherwise. When defined, support for floating point operations is disabled.
In addition to these standard macros, Boost.
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|Apply bit-wise "or" with v to variable, returning the result. Add v to variable, returning true if the result is non-zero and false otherwise. One widespread example of that is Intel x87 extended double format, which is typically stored as 80 bits of value padded with 16 or 48 unused bits.
For example, you can build Boost.
Perform release operation.