kernel/include/kern/lock.h

   1 #ifndef _KERN_LOCK_H
   2 #define _KERN_LOCK_H
   3
   4 #include <kern/kernel.h>
   5 #include <kern/spinlock.h>
   6 #include <kern/thread.h>
   7 #include <util/spinlock.h>
   8
   9 namespace Lock {
  10         extern int dying;
  11
  12         struct Lock {
  13                 SpinLock spinlock;
  14                 Threads::WaitQueue waitqueue;
  15                 ulong lockval;
  16
  17                 Lock()
  18                 {
  19                         lockval = 0;
  20                 }
  21
  22                 void lock();
  23                 void unlock();
  24
  25                 bool held_by_curthread()
  26                 {
  27                         return lockval == reinterpret_cast<ulong>(curthread);
  28                 }
  29         };
  30 }
  31
  32 #endif