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authorChris Lattner <sabre@nondot.org>2008-04-01 06:05:21 +0000
committerChris Lattner <sabre@nondot.org>2008-04-01 06:05:21 +0000
commit11da4cf25c3de590ecf434316973e9f25eec34c3 (patch)
treed87f943e29eaabf9e204fd2ab8af186183e915e9 /lib/System/Unix/MappedFile.inc
parent799ed1053b6a4cb2e3a6d588bd24025daee7ad1f (diff)
Reimplement MemoryBuffer::getFile with three enhancements:
1) stop using MappedFile. 2) if profitable use the sys::path::MapInFilePages api to read the file. 3) otherwise fallback to read. When sys::path::MapInFilePages is implemented, this provides several benefits: #1: this avoids fragmenting memory for small files. #2: this avoids extraneous stat calls when the file size is known. #3: this only keeps the file descriptor open while reading the file, not for the duration of the lifetime of the memory buffer. This fixes a serious clang FD 'leak' problem. I believe that this will work on a win32 machine, but I don't have one to test on. I'd appreciate it if someone could check. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49031 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/System/Unix/MappedFile.inc')
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