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HEAD
/boot/defaults/loader.conf: Adjust a comment.
[dragonfly.git]
/
test
/
sysperf
/
mtx.s
1
/*
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* $DragonFly: src/test/sysperf/mtx.s,v 1.2 2006/04/22 22:32:52 dillon Exp $
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*/
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.text
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.globl get_mtx
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.globl rel_mtx
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.globl try_spin_mtx
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.globl rel_spin_mtx
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get_mtx:
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movl mtx,%edx
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movl 4(%esp),%ecx
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1: subl %eax,%eax
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lock cmpxchgl %ecx,(%edx)
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jnz 1b
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ret
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rel_mtx:
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movl mtx,%edx
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movl $0,(%edx)
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ret
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try_spin_mtx:
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movl mtx,%edx
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movl $1,%eax
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xchgl %eax,(%edx)
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ret
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rel_spin_mtx:
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movl mtx,%edx
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movl $0,(%edx)
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ret