diff options
Diffstat (limited to 'libthreads/i386/lock.s')
| -rw-r--r-- | libthreads/i386/lock.s | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/libthreads/i386/lock.s b/libthreads/i386/lock.s index e27fa7ff..f064e5bb 100644 --- a/libthreads/i386/lock.s +++ b/libthreads/i386/lock.s @@ -26,6 +26,10 @@ /* * HISTORY * $Log: lock.s,v $ + * Revision 2.6 93/05/10 17:51:38 rvb + * Use C Comment + * [93/05/04 18:14:05 rvb] + * * Revision 2.5 91/05/14 17:57:20 mrt * Correcting copyright * @@ -49,22 +53,22 @@ * boolean_t spin_try_lock(int *m) */ ENTRY(spin_try_lock) - movl 4(%esp),%ecx / point at mutex - movl $1,%eax / set locked value in acc - xchg %eax,(%ecx) / swap with mutex - / xchg with memory is automatically - / locked - xorl $1,%eax / 1 (locked) => FALSE - / 0 (locked) => TRUE + movl 4(%esp),%ecx /* point at mutex */ + movl $1,%eax /* set locked value in acc */ + xchg %eax,(%ecx) /* swap with mutex */ + /* xchg with memory is automatically */ + /* locked */ + xorl $1,%eax /* 1 (locked) => FALSE */ + /* 0 (locked) => TRUE */ ret /* * void spin_unlock(int *m) */ ENTRY(spin_unlock) - movl 4(%esp),%ecx / point at mutex - xorl %eax,%eax / set unlocked value in acc - xchg %eax,(%ecx) / swap with mutex - / xchg with memory is automatically - / locked + movl 4(%esp),%ecx /* point at mutex */ + xorl %eax,%eax /* set unlocked value in acc */ + xchg %eax,(%ecx) /* swap with mutex */ + /* xchg with memory is automatically */ + /* locked */ ret |