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| author | kib <kib@FreeBSD.org> | 2012-09-26 09:25:11 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2012-09-26 09:25:11 +0000 |
| commit | 0c5a309cd8a104f5a4c08509cfa99a78e04e1259 (patch) | |
| tree | 1a3bf7ec6abd5d88725b3ec2dc4d9af341628f33 /sys/kern/kern_thread.c | |
| parent | 625aa019e15a1c35c558ebe8d7a0c3ba4faf345f (diff) | |
| download | FreeBSD-src-0c5a309cd8a104f5a4c08509cfa99a78e04e1259.zip FreeBSD-src-0c5a309cd8a104f5a4c08509cfa99a78e04e1259.tar.gz | |
Make the updates of the tid ring buffer' head and tail pointers
explicit by moving them into separate statements from the buffer
element accesses.
Requested by: jhb
MFC after: 3 days
Diffstat (limited to 'sys/kern/kern_thread.c')
| -rw-r--r-- | sys/kern/kern_thread.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/sys/kern/kern_thread.c b/sys/kern/kern_thread.c index 9d92447..bee267f 100644 --- a/sys/kern/kern_thread.c +++ b/sys/kern/kern_thread.c @@ -102,8 +102,8 @@ tid_alloc(void) mtx_unlock(&tid_lock); return (-1); } - tid = tid_buffer[tid_head++]; - tid_head %= TID_BUFFER_SIZE; + tid = tid_buffer[tid_head]; + tid_head = (tid_head + 1) % TID_BUFFER_SIZE; mtx_unlock(&tid_lock); return (tid); } @@ -115,11 +115,11 @@ tid_free(lwpid_t tid) mtx_lock(&tid_lock); if ((tid_tail + 1) % TID_BUFFER_SIZE == tid_head) { - tmp_tid = tid_buffer[tid_head++]; - tid_head %= TID_BUFFER_SIZE; + tmp_tid = tid_buffer[tid_head]; + tid_head = (tid_head + 1) % TID_BUFFER_SIZE; } - tid_buffer[tid_tail++] = tid; - tid_tail %= TID_BUFFER_SIZE; + tid_buffer[tid_tail] = tid; + tid_tail = (tid_tail + 1) % TID_BUFFER_SIZE; mtx_unlock(&tid_lock); if (tmp_tid != -1) free_unr(tid_unrhdr, tmp_tid); |
