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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef LIBRARIES_NACL_IO_KERNEL_OBJECT_H_ | 5 #ifndef LIBRARIES_NACL_IO_KERNEL_OBJECT_H_ |
6 #define LIBRARIES_NACL_IO_KERNEL_OBJECT_H_ | 6 #define LIBRARIES_NACL_IO_KERNEL_OBJECT_H_ |
7 | 7 |
8 #include <pthread.h> | 8 #include <pthread.h> |
9 | 9 |
10 #include <map> | 10 #include <map> |
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26 // objects such as the CWD, mount points, file descriptors and file handles. | 26 // objects such as the CWD, mount points, file descriptors and file handles. |
27 // All Kernel locks are private to ensure the lock order. | 27 // All Kernel locks are private to ensure the lock order. |
28 // | 28 // |
29 // All calls are assumed to be a relative path. | 29 // All calls are assumed to be a relative path. |
30 class KernelObject { | 30 class KernelObject { |
31 public: | 31 public: |
32 struct Descriptor_t { | 32 struct Descriptor_t { |
33 Descriptor_t() : flags(0) {} | 33 Descriptor_t() : flags(0) {} |
34 explicit Descriptor_t(const ScopedKernelHandle& h, | 34 explicit Descriptor_t(const ScopedKernelHandle& h, |
35 const std::string& open_path) | 35 const std::string& open_path) |
36 : handle(h), flags(0), path(open_path) {} | 36 : handle(h), flags(0), path(open_path) {} |
37 | 37 |
38 ScopedKernelHandle handle; | 38 ScopedKernelHandle handle; |
39 int flags; | 39 int flags; |
40 std::string path; | 40 std::string path; |
41 }; | 41 }; |
42 typedef std::vector<Descriptor_t> HandleMap_t; | 42 typedef std::vector<Descriptor_t> HandleMap_t; |
43 typedef std::map<std::string, ScopedFilesystem> FsMap_t; | 43 typedef std::map<std::string, ScopedFilesystem> FsMap_t; |
44 | 44 |
45 KernelObject(); | 45 KernelObject(); |
46 virtual ~KernelObject(); | 46 virtual ~KernelObject(); |
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67 ScopedNode* out_node); | 67 ScopedNode* out_node); |
68 | 68 |
69 // Get FD-specific flags (currently only FD_CLOEXEC is supported). | 69 // Get FD-specific flags (currently only FD_CLOEXEC is supported). |
70 Error GetFDFlags(int fd, int* out_flags); | 70 Error GetFDFlags(int fd, int* out_flags); |
71 // Set FD-specific flags (currently only FD_CLOEXEC is supported). | 71 // Set FD-specific flags (currently only FD_CLOEXEC is supported). |
72 Error SetFDFlags(int fd, int flags); | 72 Error SetFDFlags(int fd, int flags); |
73 | 73 |
74 // Convert from FD to KernelHandle, and acquire the handle. | 74 // Convert from FD to KernelHandle, and acquire the handle. |
75 // Assumes |out_handle| is non-NULL. | 75 // Assumes |out_handle| is non-NULL. |
76 Error AcquireHandle(int fd, ScopedKernelHandle* out_handle); | 76 Error AcquireHandle(int fd, ScopedKernelHandle* out_handle); |
77 Error AcquireHandleAndPath(int fd, ScopedKernelHandle *out_handle, | 77 Error AcquireHandleAndPath(int fd, |
| 78 ScopedKernelHandle* out_handle, |
78 std::string* out_path); | 79 std::string* out_path); |
79 | 80 |
80 // Allocate a new fd and assign the handle to it, while | 81 // Allocate a new fd and assign the handle to it, while |
81 // ref counting the handle and associated filesystem. | 82 // ref counting the handle and associated filesystem. |
82 // Assumes |handle| is non-NULL; | 83 // Assumes |handle| is non-NULL; |
83 int AllocateFD(const ScopedKernelHandle& handle, | 84 int AllocateFD(const ScopedKernelHandle& handle, |
84 const std::string& path=std::string()); | 85 const std::string& path = std::string()); |
85 | 86 |
86 // Assumes |handle| is non-NULL; | 87 // Assumes |handle| is non-NULL; |
87 void FreeAndReassignFD(int fd, const ScopedKernelHandle& handle, | 88 void FreeAndReassignFD(int fd, |
| 89 const ScopedKernelHandle& handle, |
88 const std::string& path); | 90 const std::string& path); |
89 void FreeFD(int fd); | 91 void FreeFD(int fd); |
90 | 92 |
91 // Returns or sets CWD | 93 // Returns or sets CWD |
92 std::string GetCWD(); | 94 std::string GetCWD(); |
93 Error SetCWD(const std::string& path); | 95 Error SetCWD(const std::string& path); |
94 | 96 |
95 // Returns parts of the absolute path for the given relative path | 97 // Returns parts of the absolute path for the given relative path |
96 Path GetAbsParts(const std::string& path); | 98 Path GetAbsParts(const std::string& path); |
97 | 99 |
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109 | 111 |
110 // Lock to protect cwd_. | 112 // Lock to protect cwd_. |
111 sdk_util::SimpleLock cwd_lock_; | 113 sdk_util::SimpleLock cwd_lock_; |
112 | 114 |
113 DISALLOW_COPY_AND_ASSIGN(KernelObject); | 115 DISALLOW_COPY_AND_ASSIGN(KernelObject); |
114 }; | 116 }; |
115 | 117 |
116 } // namespace nacl_io | 118 } // namespace nacl_io |
117 | 119 |
118 #endif // LIBRARIES_NACL_IO_KERNEL_OBJECT_H_ | 120 #endif // LIBRARIES_NACL_IO_KERNEL_OBJECT_H_ |
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