#include <thread.h>

Include dependency graph for spinlock.h:

Data Structures
struct	spinlock_t

Macros
#define	SPIN_LOCK_UNLOCKED { 1 }

#define	DECLARE_SPIN_LOCK(x) static spinlock_t x = SPIN_LOCK_UNLOCKED;

#define	barrier() __asm__ __volatile__("" : : : "memory")

#define	spin_is_locked(x) ((volatile int )(&(x)->lock) <= 0)

#define	spin_unlock_wait(x) do { barrier(); } while (spin_is_locked(x))

#define	spin_lock_string

#define	spin_unlock_string "movl $1,%0"

Functions
static __always_inline void	spin_lock (spinlock_t *lock)

static __always_inline void	spin_unlock (spinlock_t *lock)

Macro Definition Documentation

◆ barrier

#define barrier ( void ) __asm__ __volatile__("" : : : "memory")

Definition at line 27 of file spinlock.h.

◆ DECLARE_SPIN_LOCK

#define DECLARE_SPIN_LOCK ( x ) static spinlock_t x = SPIN_LOCK_UNLOCKED;

Definition at line 18 of file spinlock.h.

◆ spin_is_locked

#define spin_is_locked ( x ) (*(volatile int *)(&(x)->lock) <= 0)

Definition at line 28 of file spinlock.h.

◆ spin_lock_string

#define spin_lock_string

Value:

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

Definition at line 32 of file spinlock.h.

◆ SPIN_LOCK_UNLOCKED

#define SPIN_LOCK_UNLOCKED { 1 }

Definition at line 16 of file spinlock.h.

◆ spin_unlock_string

#define spin_unlock_string "movl $1,%0"

Definition at line 47 of file spinlock.h.

◆ spin_unlock_wait

#define spin_unlock_wait ( x ) do { barrier(); } while (spin_is_locked(x))

Definition at line 29 of file spinlock.h.

Function Documentation

◆ spin_lock()

static __always_inline void spin_lock ( spinlock_t * lock )

static

Definition at line 50 of file spinlock.h.

References lock(), spin_lock_string, and thread_coop_disable().

Here is the call graph for this function:

◆ spin_unlock()

static __always_inline void spin_unlock ( spinlock_t * lock )