// 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. package linux // From <linux/futex.h> and <sys/time.h>. // Flags are used in syscall futex(2). const ( FUTEX_WAIT = 0 FUTEX_WAKE = 1 FUTEX_FD = 2 FUTEX_REQUEUE = 3 FUTEX_CMP_REQUEUE = 4 FUTEX_WAKE_OP = 5 FUTEX_LOCK_PI = 6 FUTEX_UNLOCK_PI = 7 FUTEX_TRYLOCK_PI = 8 FUTEX_WAIT_BITSET = 9 FUTEX_WAKE_BITSET = 10 FUTEX_WAIT_REQUEUE_PI = 11 FUTEX_CMP_REQUEUE_PI = 12 FUTEX_PRIVATE_FLAG = 128 FUTEX_CLOCK_REALTIME = 256 ) // These are flags are from <linux/futex.h> and are used in FUTEX_WAKE_OP // to define the operations. const ( FUTEX_OP_SET = 0 FUTEX_OP_ADD = 1 FUTEX_OP_OR = 2 FUTEX_OP_ANDN = 3 FUTEX_OP_XOR = 4 FUTEX_OP_OPARG_SHIFT = 8 FUTEX_OP_CMP_EQ = 0 FUTEX_OP_CMP_NE = 1 FUTEX_OP_CMP_LT = 2 FUTEX_OP_CMP_LE = 3 FUTEX_OP_CMP_GT = 4 FUTEX_OP_CMP_GE = 5 ) // FUTEX_TID_MASK is the TID portion of a PI futex word. const FUTEX_TID_MASK = 0x3fffffff // Constants used for priority-inheritance futexes. const ( FUTEX_WAITERS = 0x80000000 FUTEX_OWNER_DIED = 0x40000000 )