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Remove other locking options

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Currently broken and we use pthreads in search.cpp
anyway, so I see no reason to keep these around

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Joona Kiiski 2010-07-23 08:26:54 +03:00 • committed by Marco Costalba
parent d5520977b9
commit 65f8b6dbc0
1 changed files with 1 additions and 51 deletions
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52
src/lock.h
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@ -22,57 +22,7 @@
#define LOCK_H_INCLUDED #define LOCK_H_INCLUDED
// x86 assembly language locks or OS spin locks may perform faster than #if !defined(_MSC_VER)
// mutex locks on some platforms. On my machine, mutexes seem to be the
// best.
//#define ASM_LOCK
//#define OS_SPIN_LOCK
#if defined(ASM_LOCK)
typedef volatile int Lock;
static inline void LockX86(Lock *lock) {
int dummy;
asm __volatile__("1: movl $1, %0" "\n\t"
" xchgl (%1), %0" "\n\t" " testl %0, %0" "\n\t"
" jz 3f" "\n\t" "2: pause" "\n\t"
" movl (%1), %0" "\n\t" " testl %0, %0" "\n\t"
" jnz 2b" "\n\t" " jmp 1b" "\n\t" "3:"
"\n\t":"=&q"(dummy)
:"q"(lock)
:"cc");
}
static inline void UnlockX86(Lock *lock) {
int dummy;
asm __volatile__("movl $0, (%1)":"=&q"(dummy)
:"q"(lock));
}
# define lock_init(x, y) (*(x) = 0)
# define lock_grab(x) LockX86(x)
# define lock_release(x) UnlockX86(x)
# define lock_destroy(x)
#elif defined(OS_SPIN_LOCK)
# include <libkern/OSAtomic.h>
typedef OSSpinLock Lock;
# define lock_init(x, y) (*(x) = 0)
# define lock_grab(x) OSSpinLockLock(x)
# define lock_release(x) OSSpinLockUnlock(x)
# define lock_destroy(x)
#elif !defined(_MSC_VER)
# include <pthread.h> # include <pthread.h>