57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package linux
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// From <linux/futex.h> and <sys/time.h>.
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// Flags are used in syscall futex(2).
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const (
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FUTEX_WAIT = 0
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FUTEX_WAKE = 1
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FUTEX_FD = 2
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FUTEX_REQUEUE = 3
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FUTEX_CMP_REQUEUE = 4
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FUTEX_WAKE_OP = 5
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FUTEX_LOCK_PI = 6
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FUTEX_UNLOCK_PI = 7
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FUTEX_TRYLOCK_PI = 8
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FUTEX_WAIT_BITSET = 9
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FUTEX_WAKE_BITSET = 10
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FUTEX_WAIT_REQUEUE_PI = 11
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FUTEX_CMP_REQUEUE_PI = 12
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FUTEX_PRIVATE_FLAG = 128
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FUTEX_CLOCK_REALTIME = 256
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)
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// These are flags are from <linux/futex.h> and are used in FUTEX_WAKE_OP
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// to define the operations.
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const (
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FUTEX_OP_SET = 0
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FUTEX_OP_ADD = 1
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FUTEX_OP_OR = 2
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FUTEX_OP_ANDN = 3
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FUTEX_OP_XOR = 4
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FUTEX_OP_OPARG_SHIFT = 8
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FUTEX_OP_CMP_EQ = 0
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FUTEX_OP_CMP_NE = 1
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FUTEX_OP_CMP_LT = 2
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FUTEX_OP_CMP_LE = 3
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FUTEX_OP_CMP_GT = 4
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FUTEX_OP_CMP_GE = 5
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)
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// FUTEX_TID_MASK is the TID portion of a PI futex word.
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const FUTEX_TID_MASK = 0x3fffffff
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