| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CONTENT_PUBLIC_BROWSER_POSIX_FILE_DESCRIPTOR_INFO_H_ |
| #define CONTENT_PUBLIC_BROWSER_POSIX_FILE_DESCRIPTOR_INFO_H_ |
| |
| #include <stddef.h> |
| |
| #include <memory> |
| |
| #include "base/files/file.h" |
| #include "base/files/memory_mapped_file.h" |
| #include "base/process/launch.h" |
| |
| namespace content { |
| |
| // PoxisFileDescriptorInfo is a collection of file descriptors which is needed |
| // to launch a process. You should tell PosixFileDescriptorInfo which FDs |
| // should be closed and which shouldn't so that it can take care of the |
| // lifetime of FDs. |
| // |
| // See base/process/launcher.h for more details about launching a process. |
| class PosixFileDescriptorInfo { |
| public: |
| virtual ~PosixFileDescriptorInfo() {} |
| |
| // Adds an FD associated with an ID, without delegating the ownerhip of ID. |
| virtual void Share(int id, base::PlatformFile fd) = 0; |
| |
| // Similar to Share but also provides a region in that file that should be |
| // read in the launched process (accessible with GetRegionAt()). |
| virtual void ShareWithRegion( |
| int id, |
| base::PlatformFile fd, |
| const base::MemoryMappedFile::Region& region) = 0; |
| |
| // Adds an FD associated with an ID, passing the FD ownership to |
| // FileDescriptorInfo. |
| virtual void Transfer(int id, base::ScopedFD fd) = 0; |
| |
| // A vector backed map of registered ID-FD pairs. |
| virtual const base::FileHandleMappingVector& GetMapping() = 0; |
| |
| // A GetMapping() variant that adjusts the ID value by |delta|. |
| // Some environments need this trick. |
| virtual base::FileHandleMappingVector GetMappingWithIDAdjustment( |
| int delta) = 0; |
| |
| // API for iterating over the registered ID-FD pairs. |
| virtual base::PlatformFile GetFDAt(size_t i) = 0; |
| virtual int GetIDAt(size_t i) = 0; |
| virtual const base::MemoryMappedFile::Region& GetRegionAt(size_t i) = 0; |
| virtual size_t GetMappingSize() = 0; |
| |
| // Returns true if |this| has ownership of |file|. |
| virtual bool OwnsFD(base::PlatformFile file) = 0; |
| // Assuming |OwnsFD(file)|, releases the ownership. |
| virtual base::ScopedFD ReleaseFD(base::PlatformFile file) = 0; |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_PUBLIC_BROWSER_POSIX_FILE_DESCRIPTOR_INFO_H_ |