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Diffstat (limited to 'Doc/library/mmap.rst')
| -rw-r--r-- | Doc/library/mmap.rst | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/Doc/library/mmap.rst b/Doc/library/mmap.rst index 1f3fbc3..698c176 100644 --- a/Doc/library/mmap.rst +++ b/Doc/library/mmap.rst @@ -81,7 +81,9 @@ To map anonymous memory, -1 should be passed as the fileno along with the length private copy-on-write mapping, so changes to the contents of the mmap object will be private to this process, and :const:`MAP_SHARED` creates a mapping that's shared with all other processes mapping the same areas of - the file. The default value is :const:`MAP_SHARED`. + the file. The default value is :const:`MAP_SHARED`. Some systems have + additional possible flags with the full list specified in + :ref:`MAP_* constants <map-constants>`. *prot*, if specified, gives the desired memory protection; the two most useful values are :const:`PROT_READ` and :const:`PROT_WRITE`, to specify @@ -342,3 +344,21 @@ MADV_* Constants Availability: Systems with the madvise() system call. .. versionadded:: 3.8 + +.. _map-constants: + +MAP_* Constants ++++++++++++++++ + +.. data:: MAP_SHARED + MAP_PRIVATE + MAP_DENYWRITE + MAP_EXECUTABLE + MAP_ANON + MAP_ANONYMOUS + MAP_POPULATE + + These are the various flags that can be passed to :meth:`mmap.mmap`. Note that some options might not be present on some systems. + + .. versionchanged:: 3.10 + Added MAP_POPULATE constant. |