[Fontconfig] fontconfig: Branch 'master'

[Behdad Esfahbod]

 configure.ac   |   22 ++++++++++++++++++++--
 src/fcatomic.h |   12 ++++++++++++
 2 files changed, 32 insertions(+), 2 deletions(-)

New commits:
commit 98efed3bcafc92b573b193b5b38039aa717617d3
Author: Behdad Esfahbod <behdad at behdad.org>
Date:   Thu Jan 10 01:17:02 2013 -0600

    Add atomic ops for Solaris
    
    Patch from Raimund Steger.

diff --git a/configure.ac b/configure.ac
index 5511077..ef222be 100644
--- a/configure.ac
+++ b/configure.ac
@@ -592,8 +592,26 @@ if $fc_cv_have_intel_atomic_primitives; then
 	AC_DEFINE(HAVE_INTEL_ATOMIC_PRIMITIVES, 1, [Have Intel __sync_* atomic primitives])
 fi
 
-AC_CHECK_HEADERS(sched.h)
-AC_CHECK_FUNCS(sched_yield)
+AC_CACHE_CHECK([for Solaris atomic operations], fc_cv_have_solaris_atomic_ops, [
+	fc_cv_have_solaris_atomic_ops=false
+	AC_TRY_LINK([
+		#include <atomic.h>
+		/* This requires Solaris Studio 12.2 or newer: */
+		#include <mbarrier.h>
+		void memory_barrier (void) { __machine_rw_barrier (); }
+		int atomic_add (volatile unsigned *i) { return atomic_add_int_nv (i, 1); }
+		void *atomic_ptr_cmpxchg (volatile void **target, void *cmp, void *newval) { return atomic_cas_ptr (target, cmp, newval); }
+		], [], fc_cv_have_solaris_atomic_ops=true
+	)
+])
+if $fc_cv_have_solaris_atomic_ops; then
+	AC_DEFINE(HAVE_SOLARIS_ATOMIC_OPS, 1, [Have Solaris __machine_*_barrier and atomic_* operations])
+fi
+
+if test "$os_win32" = no && ! $have_pthread; then
+	AC_CHECK_HEADERS(sched.h)
+	AC_SEARCH_LIBS(sched_yield,rt,AC_DEFINE(HAVE_SCHED_YIELD, 1, [Have sched_yield]))
+fi
 
 have_pthread=false
 if test "$os_win32" = no; then
diff --git a/src/fcatomic.h b/src/fcatomic.h
index 72ae372..a764311 100644
--- a/src/fcatomic.h
+++ b/src/fcatomic.h
@@ -87,6 +87,18 @@ typedef int fc_atomic_int_t;
 #define fc_atomic_ptr_cmpexch(P,O,N)	__sync_bool_compare_and_swap ((P), (O), (N))
 
 
+#elif !defined(FC_NO_MT) && defined(HAVE_SOLARIS_ATOMIC_OPS)
+
+#include <atomic.h>
+#include <mbarrier.h>
+
+typedef unsigned int fc_atomic_int_t;
+#define fc_atomic_int_add(AI, V)	( ({__machine_rw_barrier ();}), atomic_add_int_nv (&(AI), (V)) - (V))
+
+#define fc_atomic_ptr_get(P)		( ({__machine_rw_barrier ();}), (void *) *(P))
+#define fc_atomic_ptr_cmpexch(P,O,N)	( ({__machine_rw_barrier ();}), atomic_cas_ptr ((P), (O), (N)) == (void *) (O) ? FcTrue : FcFalse)
+
+
 #elif !defined(FC_NO_MT)
 
 #define FC_ATOMIC_INT_NIL 1 /* Warn that fallback implementation is in use. */