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Diffstat (limited to 'pkg/sleep/commit_amd64.s')
| -rw-r--r-- | pkg/sleep/commit_amd64.s | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/pkg/sleep/commit_amd64.s b/pkg/sleep/commit_amd64.s new file mode 100644 index 000000000..bc4ac2c3c --- /dev/null +++ b/pkg/sleep/commit_amd64.s @@ -0,0 +1,35 @@ +// Copyright 2018 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#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 |