summaryrefslogtreecommitdiff
path: root/Source/cmFileLockPool.h
blob: dae68dd011d4314de28014b3513bf3a47e102df5 (plain)
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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file Copyright.txt or https://cmake.org/licensing for details.  */
#ifndef cmFileLockPool_h
#define cmFileLockPool_h

#include "cmConfigure.h" // IWYU pragma: keep

#include <string>
#include <vector>

class cmFileLock;
class cmFileLockResult;

class cmFileLockPool
{
public:
  cmFileLockPool();
  ~cmFileLockPool();

  cmFileLockPool(cmFileLockPool const&) = delete;
  cmFileLockPool& operator=(cmFileLockPool const&) = delete;

  //@{
  /**
   * @brief Function scope control.
   */
  void PushFunctionScope();
  void PopFunctionScope();
  //@}

  //@{
  /**
   * @brief File scope control.
   */
  void PushFileScope();
  void PopFileScope();
  //@}

  //@{
  /**
   * @brief Lock the file in given scope.
   * @param timeoutSec Lock timeout. If -1 try until success or fatal error.
   */
  cmFileLockResult LockFunctionScope(const std::string& filename,
                                     unsigned long timeoutSec);
  cmFileLockResult LockFileScope(const std::string& filename,
                                 unsigned long timeoutSec);
  cmFileLockResult LockProcessScope(const std::string& filename,
                                    unsigned long timeoutSec);
  //@}

  /**
   * @brief Unlock the file explicitly.
   */
  cmFileLockResult Release(const std::string& filename);

private:
  bool IsAlreadyLocked(const std::string& filename) const;

  class ScopePool
  {
  public:
    ScopePool();
    ~ScopePool();

    ScopePool(ScopePool const&) = delete;
    ScopePool& operator=(ScopePool const&) = delete;

    cmFileLockResult Lock(const std::string& filename,
                          unsigned long timeoutSec);
    cmFileLockResult Release(const std::string& filename);
    bool IsAlreadyLocked(const std::string& filename) const;

  private:
    using List = std::vector<cmFileLock*>;
    using It = List::iterator;
    using CIt = List::const_iterator;

    List Locks;
  };

  using List = std::vector<ScopePool*>;

  using It = List::iterator;
  using CIt = List::const_iterator;

  List FunctionScopes;
  List FileScopes;
  ScopePool ProcessScope;
};

#endif // cmFileLockPool_h