Mercurial > hg > nginx
changeset 937:fc1358d3d23a
larx/stcx. should cycle if the reservation was cleared
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Thu, 21 Dec 2006 15:20:15 +0000 |
| parents | 2864303e0ce5 |
| children | c4f120548171 |
| files | src/os/unix/ngx_gcc_atomic_ppc.h |
| diffstat | 1 files changed, 8 insertions(+), 6 deletions(-) [+] |
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--- a/src/os/unix/ngx_gcc_atomic_ppc.h +++ b/src/os/unix/ngx_gcc_atomic_ppc.h @@ -28,15 +28,16 @@ ngx_atomic_cmp_set(ngx_atomic_t *lock, n __asm__ volatile ( " li %0, 0 \n" /* preset "0" to "res" */ + "1: \n" " ldarx %1, 0, %2 \n" /* load from [lock] into "temp" */ /* and store reservation */ " cmpd %1, %3 \n" /* compare "temp" and "old" */ - " bne- 1f \n" /* not equal */ + " bne- 2f \n" /* not equal */ " stdcx. %4, 0, %2 \n" /* store "set" into [lock] if reservation */ /* is not cleared */ - " bne- 1f \n" /* the reservation was cleared */ + " bne- 1b \n" /* the reservation was cleared */ " li %0, 1 \n" /* set "1" to "res" */ - "1: \n" + "2: \n" : "=&b" (res), "=&b" (temp) : "b" (lock), "b" (old), "b" (set) @@ -85,15 +86,16 @@ ngx_atomic_cmp_set(ngx_atomic_t *lock, n __asm__ volatile ( " li %0, 0 \n" /* preset "0" to "res" */ + "1: \n" " lwarx %1, 0, %2 \n" /* load from [lock] into "temp" */ /* and store reservation */ " cmpw %1, %3 \n" /* compare "temp" and "old" */ - " bne- 1f \n" /* not equal */ + " bne- 2f \n" /* not equal */ " stwcx. %4, 0, %2 \n" /* store "set" into [lock] if reservation */ /* is not cleared */ - " bne- 1f \n" /* the reservation was cleared */ + " bne- 1b \n" /* the reservation was cleared */ " li %0, 1 \n" /* set "1" to "res" */ - "1: \n" + "2: \n" : "=&b" (res), "=&b" (temp) : "b" (lock), "b" (old), "b" (set)