kitten/include/lwk/spinlock_types.h

   1 #ifndef _LWK_SPINLOCK_TYPES_H
   2 #define _LWK_SPINLOCK_TYPES_H
   3
   4 /*
   5  * include/lwk/spinlock_types.h - generic spinlock type definitions
   6  *                                and initializers
   7  *
   8  * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
   9  * Released under the General Public License (GPL).
  10  */
  11
  12 #include <arch/spinlock_types.h>
  13
  14 typedef struct {
  15         raw_spinlock_t raw_lock;
  16 #ifdef CONFIG_DEBUG_SPINLOCK
  17         unsigned int magic, owner_cpu;
  18         void *owner;
  19 #endif
  20 } spinlock_t;
  21
  22 #define SPINLOCK_MAGIC          0xdead4ead
  23
  24 typedef struct {
  25         raw_rwlock_t raw_lock;
  26 #ifdef CONFIG_DEBUG_SPINLOCK
  27         unsigned int magic, owner_cpu;
  28         void *owner;
  29 #endif
  30 } rwlock_t;
  31
  32 #define RWLOCK_MAGIC            0xdeaf1eed
  33
  34 #define SPINLOCK_OWNER_INIT     ((void *)-1L)
  35
  36 #ifdef CONFIG_DEBUG_SPINLOCK
  37 # define SPIN_LOCK_UNLOCKED                                             \
  38                         {       .raw_lock = __RAW_SPIN_LOCK_UNLOCKED,   \
  39                                 .magic = SPINLOCK_MAGIC,                \
  40                                 .owner = SPINLOCK_OWNER_INIT,           \
  41                                 .owner_cpu = -1 }
  42 #define RW_LOCK_UNLOCKED                                                \
  43                         {       .raw_lock = __RAW_RW_LOCK_UNLOCKED,     \
  44                                 .magic = RWLOCK_MAGIC,                  \
  45                                 .owner = SPINLOCK_OWNER_INIT,           \
  46                                 .owner_cpu = -1 }
  47 #else
  48 # define SPIN_LOCK_UNLOCKED \
  49                         {       .raw_lock = __RAW_SPIN_LOCK_UNLOCKED }
  50 #define RW_LOCK_UNLOCKED \
  51                         {       .raw_lock = __RAW_RW_LOCK_UNLOCKED }
  52 #endif
  53
  54 #define DEFINE_SPINLOCK(x)      spinlock_t x = SPIN_LOCK_UNLOCKED
  55 #define DEFINE_RWLOCK(x)        rwlock_t x = RW_LOCK_UNLOCKED
  56
  57 #endif /* _LWK_SPINLOCK_TYPES_H */