/usr/include/fst/lock.h is in libfst-dev 1.5.3+r3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | // lock.h
//
// 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.
//
// Author: riley@google.com (Michael Riley)
//
// \file
// Google-compatibility locking declarations and inline definitions
//
// Classes and functions here are no-ops (by design); proper locking requires
// actual implementation.
#ifndef FST_LIB_LOCK_H_
#define FST_LIB_LOCK_H_
#include <fst/compat.h> // for DISALLOW_COPY_AND_ASSIGN
namespace fst {
using namespace std;
//
// Single initialization - single-thread implementation
//
typedef int FstOnceType;
static const int FST_ONCE_INIT = 1;
inline int FstOnceInit(FstOnceType *once, void (*init)(void)) {
if (*once)
(*init)();
*once = 0;
return 0;
}
//
// Thread locking - single-thread (non-)implementation
//
class Mutex {
public:
Mutex() {}
private:
DISALLOW_COPY_AND_ASSIGN(Mutex);
};
class MutexLock {
public:
MutexLock(Mutex *) {}
private:
DISALLOW_COPY_AND_ASSIGN(MutexLock);
};
class ReaderMutexLock {
public:
ReaderMutexLock(Mutex *) {}
private:
DISALLOW_COPY_AND_ASSIGN(ReaderMutexLock);
};
} // namespace fst
#endif // FST_LIB_LOCK_H_
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