mirror of
https://github.com/xen-project/xen.git
synced 2026-10-28 18:21:39 +01:00
Keir Fraser
8f96998338
This adds fixes to the stub domain build into compiling Ian Jackson's qemu-xen. The most notable change is that mini-os headers now #include each other through a mini-os/ prefix, so that we can turn all -I into -isystem and still be sure that we include Mini-OS headers (and not qemu's console.h or blktaplib's list.h for instance...). Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
#ifndef __ASM_SPINLOCK_H
|
|
#define __ASM_SPINLOCK_H
|
|
|
|
#include <mini-os/lib.h>
|
|
|
|
/*
|
|
* Your basic SMP spinlocks, allowing only a single CPU anywhere
|
|
*/
|
|
|
|
typedef struct {
|
|
volatile unsigned int slock;
|
|
} spinlock_t;
|
|
|
|
|
|
#include <mini-os/arch_spinlock.h>
|
|
|
|
|
|
#define SPINLOCK_MAGIC 0xdead4ead
|
|
|
|
#define SPIN_LOCK_UNLOCKED ARCH_SPIN_LOCK_UNLOCKED
|
|
|
|
#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while(0)
|
|
|
|
/*
|
|
* Simple spin lock operations. There are two variants, one clears IRQ's
|
|
* on the local processor, one does not.
|
|
*
|
|
* We make no fairness assumptions. They have a cost.
|
|
*/
|
|
|
|
#define spin_is_locked(x) arch_spin_is_locked(x)
|
|
|
|
#define spin_unlock_wait(x) do { barrier(); } while(spin_is_locked(x))
|
|
|
|
|
|
#define _spin_trylock(lock) ({_raw_spin_trylock(lock) ? \
|
|
1 : ({ 0;});})
|
|
|
|
#define _spin_lock(lock) \
|
|
do { \
|
|
_raw_spin_lock(lock); \
|
|
} while(0)
|
|
|
|
#define _spin_unlock(lock) \
|
|
do { \
|
|
_raw_spin_unlock(lock); \
|
|
} while (0)
|
|
|
|
|
|
#define spin_lock(lock) _spin_lock(lock)
|
|
#define spin_unlock(lock) _spin_unlock(lock)
|
|
|
|
#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED
|
|
|
|
#endif
|