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| author | Googler <noreply@google.com> | 2018-04-27 10:37:02 -0700 |
|---|---|---|
| committer | Adin Scannell <ascannell@google.com> | 2018-04-28 01:44:26 -0400 |
| commit | d02b74a5dcfed4bfc8f2f8e545bca4d2afabb296 (patch) | |
| tree | 54f95eef73aee6bacbfc736fffc631be2605ed53 /pkg/sleep/commit_amd64.s | |
| parent | f70210e742919f40aa2f0934a22f1c9ba6dada62 (diff) | |
Check in gVisor.
PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463
Diffstat (limited to 'pkg/sleep/commit_amd64.s')
| -rw-r--r-- | pkg/sleep/commit_amd64.s | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/pkg/sleep/commit_amd64.s b/pkg/sleep/commit_amd64.s new file mode 100644 index 000000000..a5b620bf8 --- /dev/null +++ b/pkg/sleep/commit_amd64.s @@ -0,0 +1,21 @@ +#include "textflag.h" + +#define preparingG 1 + +// See commit_noasm.go for a description of commitSleep. +// +// func commitSleep(g uintptr, waitingG *uintptr) bool +TEXT ·commitSleep(SB),NOSPLIT,$0-24 + MOVQ waitingG+8(FP), CX + MOVQ g+0(FP), DX + + // Store the G in waitingG if it's still preparingG. If it's anything + // else it means a waker has aborted the sleep. + MOVQ $preparingG, AX + LOCK + CMPXCHGQ DX, 0(CX) + + SETEQ AX + MOVB AX, ret+16(FP) + + RET |