| Directory: | cvmfs/ |
|---|---|
| File: | cvmfs/util/file_guard.h |
| Date: | 2024-04-28 02:33:07 |
| Exec | Total | Coverage | |
|---|---|---|---|
| Lines: | 14 | 14 | 100.0% |
| Branches: | 4 | 6 | 66.7% |
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /** | ||
| 2 | * This file is part of the CernVM File System. | ||
| 3 | */ | ||
| 4 | |||
| 5 | #ifndef CVMFS_UTIL_FILE_GUARD_H_ | ||
| 6 | #define CVMFS_UTIL_FILE_GUARD_H_ | ||
| 7 | |||
| 8 | #include <unistd.h> | ||
| 9 | |||
| 10 | #include <cstdio> | ||
| 11 | #include <string> | ||
| 12 | |||
| 13 | #include "util/single_copy.h" | ||
| 14 | |||
| 15 | #ifdef CVMFS_NAMESPACE_GUARD | ||
| 16 | namespace CVMFS_NAMESPACE_GUARD { | ||
| 17 | #endif | ||
| 18 | |||
| 19 | |||
| 20 | /** | ||
| 21 | * RAII object to call `unlink()` on a containing file when it gets out of scope | ||
| 22 | */ | ||
| 23 | class UnlinkGuard : SingleCopy { | ||
| 24 | public: | ||
| 25 | enum InitialState { kEnabled, kDisabled }; | ||
| 26 | |||
| 27 | 25 | inline UnlinkGuard() : enabled_(false) {} | |
| 28 | 472 | inline explicit UnlinkGuard(const std::string &path, | |
| 29 | const InitialState state = kEnabled) | ||
| 30 | 472 | : path_(path) | |
| 31 | 472 | , enabled_(state == kEnabled) {} | |
| 32 |
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494 | inline ~UnlinkGuard() { if (IsEnabled()) unlink(path_.c_str()); } |
| 33 | |||
| 34 | 25 | inline void Set(const std::string &path) { path_ = path; Enable(); } | |
| 35 | |||
| 36 | 974 | inline bool IsEnabled() const { return enabled_; } | |
| 37 | 133 | inline void Enable() { enabled_ = true; } | |
| 38 | 7 | inline void Disable() { enabled_ = false; } | |
| 39 | |||
| 40 | 2146 | const std::string& path() const { return path_; } | |
| 41 | |||
| 42 | private: | ||
| 43 | std::string path_; | ||
| 44 | bool enabled_; | ||
| 45 | }; | ||
| 46 | |||
| 47 | |||
| 48 | /** | ||
| 49 | * RAII object to close a file descriptor when it gets out of scope | ||
| 50 | */ | ||
| 51 | class FdGuard : SingleCopy { | ||
| 52 | public: | ||
| 53 | inline FdGuard() : fd_(-1) { } | ||
| 54 | 10 | explicit inline FdGuard(const int fd) : fd_(fd) { } | |
| 55 |
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10 | inline ~FdGuard() { if (fd_ >= 0) close(fd_); } |
| 56 | int fd() const { return fd_; } | ||
| 57 | |||
| 58 | private: | ||
| 59 | int fd_; | ||
| 60 | }; | ||
| 61 | |||
| 62 | |||
| 63 | /** | ||
| 64 | * RAII object to close a FILE stream when it gets out of scope | ||
| 65 | */ | ||
| 66 | class FileGuard : SingleCopy { | ||
| 67 | public: | ||
| 68 | inline FileGuard() : file_(NULL) { } | ||
| 69 | 608 | explicit inline FileGuard(FILE *file) : file_(file) { } | |
| 70 |
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608 | inline ~FileGuard() { if (file_ != NULL) fclose(file_); } |
| 71 | const FILE *file() const { return file_; } | ||
| 72 | |||
| 73 | private: | ||
| 74 | FILE *file_; | ||
| 75 | }; | ||
| 76 | |||
| 77 | |||
| 78 | #ifdef CVMFS_NAMESPACE_GUARD | ||
| 79 | } // namespace CVMFS_NAMESPACE_GUARD | ||
| 80 | #endif | ||
| 81 | |||
| 82 | #endif // CVMFS_UTIL_FILE_GUARD_H_ | ||
| 83 |