summaryrefslogtreecommitdiff
path: root/libcult/cult/mm/arch/i386/i486
diff options
context:
space:
mode:
Diffstat (limited to 'libcult/cult/mm/arch/i386/i486')
-rw-r--r--libcult/cult/mm/arch/i386/i486/i586/i686/x86_64/counter.hxx43
-rw-r--r--libcult/cult/mm/arch/i386/i486/i586/i686/x86_64/counter.ixx46
2 files changed, 89 insertions, 0 deletions
diff --git a/libcult/cult/mm/arch/i386/i486/i586/i686/x86_64/counter.hxx b/libcult/cult/mm/arch/i386/i486/i586/i686/x86_64/counter.hxx
new file mode 100644
index 0000000..5869b09
--- /dev/null
+++ b/libcult/cult/mm/arch/i386/i486/i586/i686/x86_64/counter.hxx
@@ -0,0 +1,43 @@
+// file : cult/mm/arch/i386/i486/i586/i686/x86_64/counter.hxx
+// author : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef CULT_MM_ARCH_I386_I486_I586_I686_X86_64_COUNTER_HXX
+#define CULT_MM_ARCH_I386_I486_I586_I686_X86_64_COUNTER_HXX
+
+#include <cult/types/fundamental.hxx>
+
+namespace Cult
+{
+ namespace MM
+ {
+ class Counter: public NonCopyable
+ {
+ public:
+ Counter ();
+
+ // After failure assume the counter has its old value.
+ //
+ Void
+ inc_ref ();
+
+
+ // After failure assume the counter has its new value.
+ //
+ Boolean
+ dec_ref ();
+
+
+ Size
+ count () const;
+
+ private:
+ Size value_;
+ };
+ }
+}
+
+#include <cult/mm/arch/i386/i486/i586/i686/x86_64/counter.ixx>
+
+#endif // CULT_MM_ARCH_I386_I486_I586_I686_X86_64_COUNTER_HXX
diff --git a/libcult/cult/mm/arch/i386/i486/i586/i686/x86_64/counter.ixx b/libcult/cult/mm/arch/i386/i486/i586/i686/x86_64/counter.ixx
new file mode 100644
index 0000000..9e9e7f4
--- /dev/null
+++ b/libcult/cult/mm/arch/i386/i486/i586/i686/x86_64/counter.ixx
@@ -0,0 +1,46 @@
+// file : cult/mm/arch/i386/i486/i586/i686/x86_64/counter.ixx
+// author : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+namespace Cult
+{
+ namespace MM
+ {
+ inline
+ Counter::
+ Counter ()
+ : value_ (1)
+ {
+ }
+
+ inline
+ Void Counter::
+ inc_ref ()
+ {
+ asm volatile ("lock; incq %0"
+ :"=m" (value_)
+ :"m" (value_));
+ }
+
+ inline
+ Boolean Counter::
+ dec_ref ()
+ {
+ register unsigned char r;
+
+ asm volatile("lock; decq %0; setz %1"
+ :"=m" (value_), "=rm" (r)
+ :"m" (value_));
+
+ return r != 0;
+ }
+
+ inline
+ Size Counter::
+ count () const
+ {
+ return value_;
+ }
+ }
+}