• jsm28's avatar
    Add out-of-line versions of some <stdatomic.h> functions (PR c/65083). · cd404a14
    jsm28 authored
    PR c/65083 notes that some functions in <stdatomic.h> are normal
    functions, not generic functions, and so need to have out-of-line
    copies that can be called when macro expansion is suppressed (unlike
    the generic functions where DR#419 makes it undefined if you suppress
    a macro expansion).
    
    This patch adds such out-of-line definitions in libatomic for those
    six functions, at a new LIBATOMIC_1.2 symbol version, as trivial
    wrappers to the <stdatomic.h> macros, along with declarations of those
    functions in <stdatomic.h>.  Tests are added that are based on the
    corresponding tests for the macros, but with parentheses around the
    function names to force the out-of-line functions to be used.
    
    Bootstrapped with no regressions on x86_64-pc-linux-gnu.
    
    gcc:
    	* ginclude/stdatomic.h (atomic_thread_fence, atomic_signal_fence)
    	(atomic_flag_test_and_set, atomic_flag_test_and_set_explicit)
    	(atomic_flag_clear, atomic_flag_clear_explicit): Declare as
    	functions before defining as macros.
    
    gcc/testsuite:
    	* gcc.dg/atomic/stdatomic-fence-2.c,
    	gcc.dg/atomic/stdatomic-flag-2.c: New tests.
    
    libatomic:
    	* fence.c, flag.c: New files.
    	* Makefile.am (libatomic_la_SOURCES): Add fence.c and flag.c.
    	* Makefile.in: Regenerate.
    	* configure.ac (libtool_VERSION): Change to 3:0:2.
    	* configure: Regenerate.
    	* libatomic.map (LIBATOMIC_1.2): New symbol version.
    
    
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230578 138bc75d-0d04-0410-961f-82ee72b054a4
    cd404a14
libatomic.map 2.33 KB