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author | Jörg Frings-Fürst <jff@merkur> | 2014-05-18 16:08:14 +0200 |
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committer | Jörg Frings-Fürst <jff@merkur> | 2014-05-18 16:08:14 +0200 |
commit | a15cf65c44d5c224169c32ef5495b68c758134b7 (patch) | |
tree | 3419f58fc8e1b315ba8171910ee044c5d467c162 /libcult/cult/mm/arch/i386/counter.ixx |
Imported Upstream version 3.3.0.2upstream/3.3.0.2
Diffstat (limited to 'libcult/cult/mm/arch/i386/counter.ixx')
-rw-r--r-- | libcult/cult/mm/arch/i386/counter.ixx | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/libcult/cult/mm/arch/i386/counter.ixx b/libcult/cult/mm/arch/i386/counter.ixx new file mode 100644 index 0000000..8279394 --- /dev/null +++ b/libcult/cult/mm/arch/i386/counter.ixx @@ -0,0 +1,46 @@ +// file : cult/mm/arch/i386/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; incl %0" + :"=m" (value_) + :"m" (value_)); + } + + inline + Boolean Counter:: + dec_ref () + { + register unsigned char r; + + asm volatile("lock; decl %0; setz %1" + :"=m" (value_), "=rm" (r) + :"m" (value_)); + + return r != 0; + } + + inline + Size Counter:: + count () const + { + return value_; + } + } +} |