Abstract interface for introducing a FileManager cache for 'stat' system calls, which is used by precompiled and pretokenized headers to improve performance. More...
#include <FileSystemStatCache.h>
Public Types | |
| enum | LookupResult { CacheExists, CacheMissing } |
Public Member Functions | |
| virtual | ~FileSystemStatCache () |
| void | setNextStatCache (FileSystemStatCache *Cache) |
| Sets the next stat call cache in the chain of stat caches. Takes ownership of the given stat cache. | |
| FileSystemStatCache * | getNextStatCache () |
| Retrieve the next stat call cache in the chain. | |
| FileSystemStatCache * | takeNextStatCache () |
| Retrieve the next stat call cache in the chain, transferring ownership of this cache (and, transitively, all of the remaining caches) to the caller. | |
Static Public Member Functions | |
| static bool | get (const char *Path, struct stat &StatBuf, int *FileDescriptor, FileSystemStatCache *Cache) |
Protected Member Functions | |
| virtual LookupResult | getStat (const char *Path, struct stat &StatBuf, int *FileDescriptor)=0 |
| LookupResult | statChained (const char *Path, struct stat &StatBuf, int *FileDescriptor) |
Protected Attributes | |
| OwningPtr< FileSystemStatCache > | NextStatCache |
Detailed Description
Abstract interface for introducing a FileManager cache for 'stat' system calls, which is used by precompiled and pretokenized headers to improve performance.
Definition at line 28 of file FileSystemStatCache.h.
Member Enumeration Documentation
Definition at line 36 of file FileSystemStatCache.h.
Constructor & Destructor Documentation
| virtual clang::FileSystemStatCache::~FileSystemStatCache | ( | ) | [inline, virtual] |
Definition at line 34 of file FileSystemStatCache.h.
Member Function Documentation
| bool FileSystemStatCache::get | ( | const char * | Path, |
| struct stat & | StatBuf, | ||
| int * | FileDescriptor, | ||
| FileSystemStatCache * | Cache | ||
| ) | [static] |
FileSystemStatCache::get - Get the 'stat' information for the specified path, using the cache to accellerate it if possible. This returns true if the path does not exist or false if it exists.
If FileDescriptor is non-null, then this lookup should only return success for files (not directories). If it is null this lookup should only return success for directories (not files). On a successful file lookup, the implementation can optionally fill in FileDescriptor with a valid descriptor and the client guarantees that it will close it.
FileSystemStatCache::get - Get the 'stat' information for the specified path, using the cache to accelerate it if possible. This returns true if the path does not exist or false if it exists.
If FileDescriptor is non-null, then this lookup should only return success for files (not directories). If it is null this lookup should only return success for directories (not files). On a successful file lookup, the implementation can optionally fill in FileDescriptor with a valid descriptor and the client guarantees that it will close it.
Definition at line 42 of file FileSystemStatCache.cpp.
References CacheExists, CacheMissing, getStat(), and S_ISDIR.
| FileSystemStatCache* clang::FileSystemStatCache::getNextStatCache | ( | ) | [inline] |
Retrieve the next stat call cache in the chain.
Definition at line 61 of file FileSystemStatCache.h.
References NextStatCache.
Referenced by clang::FileManager::addStatCache(), clang::FileManager::removeStatCache(), and statChained().
| virtual LookupResult clang::FileSystemStatCache::getStat | ( | const char * | Path, |
| struct stat & | StatBuf, | ||
| int * | FileDescriptor | ||
| ) | [protected, pure virtual] |
Implemented in clang::MemorizeStatCalls.
Referenced by get().
| void clang::FileSystemStatCache::setNextStatCache | ( | FileSystemStatCache * | Cache | ) | [inline] |
Sets the next stat call cache in the chain of stat caches. Takes ownership of the given stat cache.
Definition at line 56 of file FileSystemStatCache.h.
References NextStatCache.
Referenced by clang::FileManager::addStatCache(), and clang::FileManager::removeStatCache().
| LookupResult clang::FileSystemStatCache::statChained | ( | const char * | Path, |
| struct stat & | StatBuf, | ||
| int * | FileDescriptor | ||
| ) | [inline, protected] |
Definition at line 72 of file FileSystemStatCache.h.
References CacheExists, CacheMissing, and getNextStatCache().
Referenced by clang::MemorizeStatCalls::getStat().
| FileSystemStatCache* clang::FileSystemStatCache::takeNextStatCache | ( | ) | [inline] |
Retrieve the next stat call cache in the chain, transferring ownership of this cache (and, transitively, all of the remaining caches) to the caller.
Definition at line 66 of file FileSystemStatCache.h.
References NextStatCache.
Member Data Documentation
OwningPtr<FileSystemStatCache> clang::FileSystemStatCache::NextStatCache [protected] |
Definition at line 31 of file FileSystemStatCache.h.
Referenced by getNextStatCache(), setNextStatCache(), and takeNextStatCache().
The documentation for this class was generated from the following files: