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23 lines
754 B
Groff
23 lines
754 B
Groff
.TH mmap_private 3
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.SH NAME
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mmap_private \- memory map a file for reading and writing
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.SH SYNTAX
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.B #include <mmap.h>
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char* \fBmmap_private\fP(const char* \fIfilename\fR,size_t* \fIfilesize\fR);
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.SH DESCRIPTION
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mmap_private opens \fIfilename\fR for reading and writing, maps the
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whole file into memory, closes the file, writes the length of the file
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to \fIfilesize\fR and returns a pointer to the mapped file.
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The file is mapped copy-on-write. Changes done to the mapped region
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will not be written to disk.
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The file is unmapped by the operating system if the process terminates.
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It can also be manually unmapped by calling \fBmunmap\fR from
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<sys/mman.h>.
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If the file could not be opened or mapped, (void*)0 is returned.
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.SH "SEE ALSO"
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mmap_unmap(3)
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