23 lines
720 B
Factor
Executable File
23 lines
720 B
Factor
Executable File
! Copyright (C) 2007 Doug Coleman.
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! See http://factorcode.org/license.txt for BSD license.
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USING: alien io io.files kernel math system unix io.unix.backend
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io.mmap ;
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IN: io.unix.mmap
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: open-r/w ( path -- fd ) O_RDWR file-mode open dup io-error ;
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: mmap-open ( length prot flags path -- alien fd )
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>r f -roll r> open-r/w [ 0 mmap ] keep
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over MAP_FAILED = [ close (io-error) ] when ;
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M: unix-io <mapped-file> ( path length -- obj )
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swap >r
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dup PROT_READ PROT_WRITE bitor MAP_FILE MAP_SHARED bitor
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r> mmap-open f mapped-file construct-boa ;
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M: unix-io close-mapped-file ( mmap -- )
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[ mapped-file-address ] keep
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[ mapped-file-length munmap ] keep
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mapped-file-handle close
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io-error ;
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