diff options
Diffstat (limited to 'kern/lock.c')
| -rw-r--r-- | kern/lock.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/kern/lock.c b/kern/lock.c index de22795..46c78da 100644 --- a/kern/lock.c +++ b/kern/lock.c @@ -318,6 +318,9 @@ void lock_write( simple_lock(&l->interlock); } } +#if MACH_LDEBUG + l->writer = current_thread(); +#endif /* MACH_LDEBUG */ simple_unlock(&l->interlock); } @@ -334,8 +337,12 @@ void lock_done( else if (l->want_upgrade) l->want_upgrade = FALSE; - else + else { l->want_write = FALSE; +#if MACH_LDEBUG + l->writer = THREAD_NULL; +#endif /* MACH_LDEBUG */ + } /* * There is no reason to wakeup a waiting thread @@ -452,6 +459,9 @@ boolean_t lock_read_to_write( } } +#if MACH_LDEBUG + l->writer = current_thread(); +#endif /* MACH_LDEBUG */ simple_unlock(&l->interlock); return FALSE; } @@ -460,6 +470,9 @@ void lock_write_to_read( lock_t l) { simple_lock(&l->interlock); +#if MACH_LDEBUG + assert(l->writer == current_thread()); +#endif /* MACH_LDEBUG */ l->read_count++; if (l->recursion_depth != 0) @@ -475,6 +488,9 @@ void lock_write_to_read( thread_wakeup(l); } +#if MACH_LDEBUG + l->writer = THREAD_NULL; +#endif /* MACH_LDEBUG */ simple_unlock(&l->interlock); } @@ -514,6 +530,9 @@ boolean_t lock_try_write( */ l->want_write = TRUE; +#if MACH_LDEBUG + l->writer = current_thread(); +#endif /* MACH_LDEBUG */ simple_unlock(&l->interlock); return TRUE; } @@ -590,6 +609,9 @@ boolean_t lock_try_read_to_write( simple_lock(&l->interlock); } +#if MACH_LDEBUG + l->writer = current_thread(); +#endif /* MACH_LDEBUG */ simple_unlock(&l->interlock); return TRUE; } @@ -602,6 +624,10 @@ void lock_set_recursive( lock_t l) { simple_lock(&l->interlock); +#if MACH_LDEBUG + assert(l->writer == current_thread()); +#endif /* MACH_LDEBUG */ + if (!l->want_write) { panic("lock_set_recursive: don't have write lock"); } |