spinlock.h File Reference

Go to the source code of this file.

Data Structures
struct	spinlock_t
Defines
#define	SPIN_LOCK_UNLOCKED   (spinlock_t) { 1 }
#define	barrier()   __asm__ __volatile__("": : :"memory")
#define	spin_is_locked(x)   (*(volatile char *)(&(x)->lock) <= 0)
#define	spin_unlock_wait(x)   do { barrier(); } while(spin_is_locked(x))
#define	spin_lock_string
#define	spin_unlock_string   "movb $1,%0"
Functions
static	__attribute__ ((always_inline)) void spin_lock(spinlock_t *lock)

---

Define Documentation

 

#define barrier

(

)

__asm__ __volatile__("": : :"memory")

Definition at line 21 of file spinlock.h.

#define spin_is_locked

(

x

)

(*(volatile char *)(&(x)->lock) <= 0)

Definition at line 22 of file spinlock.h.

#define spin_lock_string

Value:

"\n1:\t" \
        "lock ; decb %0\n\t" \
        "js 2f\n" \
        ".section .text.lock,\"ax\"\n" \
        "2:\t" \
        "cmpb $0,%0\n\t" \
        "rep;nop\n\t" \
        "jle 2b\n\t" \
        "jmp 1b\n" \
        ".previous"

Definition at line 25 of file spinlock.h.

Referenced by __attribute__().

#define SPIN_LOCK_UNLOCKED   (spinlock_t) { 1 }

Definition at line 13 of file spinlock.h.

#define spin_unlock_string   "movb $1,%0"

Definition at line 40 of file spinlock.h.

#define spin_unlock_wait

(

x

)

do { barrier(); } while(spin_is_locked(x))

Definition at line 23 of file spinlock.h.

---

Function Documentation

static __attribute__

(

(always_inline)

)

[inline, static]

Definition at line 43 of file spinlock.h.

References __asm__(), and spin_lock_string.

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