From: Ivan Maidanski <ivmai@mail.ru>
Date: Thu, 1 Dec 2011 16:37:54 +0000 (+0400)
Subject: Add all AO control macros to configure (as templates)
X-Git-Tag: libatomic_ops-7_3alpha2~50
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=94adc85459a857cdd672aaf8ae7103627e9dc54d;p=libatomic_ops

Add all AO control macros to configure (as templates)

* configure.ac (AO_USE_NANOSLEEP, AO_USE_NO_SIGNALS,
AO_USE_WIN32_PTHREADS, AO_TRACE_MALLOC, AO_GENERALIZE_ASM_BOOL_CAS,
AO_USE_PTHREAD_DEFS, AO_ASM_X64_AVAILABLE, AO_ASSUME_VISTA,
AO_ASSUME_WINDOWS98, AO_CMPXCHG16B_AVAILABLE, AO_FORCE_USE_SWP,
AO_NO_SPARC_V9, AO_OLD_STYLE_INTERLOCKED_COMPARE_EXCHANGE,
AO_UNIPROCESSOR, AO_USE_INTERLOCKED_INTRINSICS,
AO_USE_PENTIUM4_INSTRS, AO_USE_SYNC_CAS_BUILTIN,
AO_WEAK_DOUBLE_CAS_EMULATION): New AC template.
---

diff --git a/configure.ac b/configure.ac
index 5928de5..4427849 100644
--- a/configure.ac
+++ b/configure.ac
@@ -69,6 +69,51 @@ AC_SUBST(DEFS)
 
 AH_TEMPLATE([_PTHREADS], [Indicates the use of pthreads (NetBSD).])
 
+AH_TEMPLATE([AO_USE_NANOSLEEP],
+        [Use nanosleep() instead of select() (only if atomic operations \
+         are emulated)])
+AH_TEMPLATE([AO_USE_NO_SIGNALS],
+        [Do not block signals in compare_and_swap (only if atomic operations \
+         are emulated)])
+AH_TEMPLATE([AO_USE_WIN32_PTHREADS],
+        [Use Win32 Sleep() instead of select() (only if atomic operations \
+         are emulated)])
+AH_TEMPLATE([AO_TRACE_MALLOC], [Trace AO_malloc/free calls (for debug only)])
+
+# These macros are tested in public headers
+AH_TEMPLATE([AO_GENERALIZE_ASM_BOOL_CAS],
+        [Force compare_and_swap definition via fetch_compare_and_swap])
+AH_TEMPLATE([AO_USE_PTHREAD_DEFS],
+        [Emulate atomic operations via slow and async-signal-unsafe \
+         pthread locking])
+AH_TEMPLATE([AO_ASM_X64_AVAILABLE],
+        [Inline assembly avalable (only VC/x86_64)])
+AH_TEMPLATE([AO_ASSUME_VISTA],
+        [Assume Windows Server 2003, Vista or later target (only VC/x86)])
+AH_TEMPLATE([AO_ASSUME_WINDOWS98],
+        [Assume hardware compare-and-swap functionality available \
+         on target (only VC/x86)])
+AH_TEMPLATE([AO_CMPXCHG16B_AVAILABLE],
+        [Assume target is not old AMD Opteron chip (only x86_64)])
+AH_TEMPLATE([AO_FORCE_USE_SWP],
+        [Force test_and_set to use SWP instruction instead of LDREX/STREX \
+         (only arm v6+)])
+AH_TEMPLATE([AO_NO_SPARC_V9], [Assume target is not sparc v9+ (only sparc)])
+AH_TEMPLATE([AO_OLD_STYLE_INTERLOCKED_COMPARE_EXCHANGE],
+        [Assume ancient MS VS Win32 headers (only VC/arm v6+, VC/x86)])
+AH_TEMPLATE([AO_UNIPROCESSOR], [Assume single-core target (only arm v6+)])
+AH_TEMPLATE([AO_USE_INTERLOCKED_INTRINSICS],
+        [Assume Win32 _Interlocked primitives available as intrinsics \
+         (only VC/arm)])
+AH_TEMPLATE([AO_USE_PENTIUM4_INSTRS],
+        [Use Pentium 4 'mfence' instruction (only x86)])
+AH_TEMPLATE([AO_USE_SYNC_CAS_BUILTIN],
+        [Prefer GCC built-in CAS intrinsics in favor of inline assembly \
+         (only gcc/x86, gcc/x86_64)])
+AH_TEMPLATE([AO_WEAK_DOUBLE_CAS_EMULATION],
+        [Emulate double-width CAS via pthread locking in case of no hardware \
+         support (only gcc/x86_64, sunc/x86_64)])
+
 THREADDLLIBS=
 have_pthreads=true
 ## Libraries needed to support threads.