sys/sys/mplock2.h

   1 /*
   2  * SYS/MPLOCK2.H
   3  *
   4  * Implement the MP lock.  Note that debug operations
   5  */
   6 #ifndef _SYS_MPLOCK2_H_
   7 #define _SYS_MPLOCK2_H_
   8
   9 #include <machine/atomic.h>
  10 #ifndef _SYS_THREAD_H_
  11 #include <sys/thread.h>
  12 #endif
  13 #ifndef _SYS_GLOBALDATA_H_
  14 #include <sys/globaldata.h>
  15 #endif
  16
  17 /*
  18  * NOTE: try_mplock()/lwkt_trytoken() return non-zero on success.
  19  */
  20 #define get_mplock()            lwkt_gettoken(&mp_token)
  21 #define try_mplock()            lwkt_trytoken(&mp_token)
  22 #define rel_mplock()            lwkt_reltoken(&mp_token)
  23 #define get_mplock_count(td)    lwkt_cnttoken(&mp_token, td)
  24
  25 void cpu_get_initial_mplock(void);
  26
  27 #define MP_LOCK_HELD()          LWKT_TOKEN_HELD_EXCL(&mp_token)
  28 #define ASSERT_MP_LOCK_HELD()   ASSERT_LWKT_TOKEN_HELD_EXCL(&mp_token)
  29
  30 #endif