85f6d866e6
. MAP_SHARED was used to implement sysv shared memory . used to signal shareable memory region to VM . assumptions about this situation break when processes use MAP_SHARED for its normal, standardised meaning
37 lines
1.4 KiB
C
37 lines
1.4 KiB
C
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#ifndef _MMAN_H
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#define _MMAN_H
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#ifndef _TYPE_H
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#include <minix/type.h>
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#endif
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/* prot argument for mmap() */
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#define PROT_NONE 0x00 /* no permissions */
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#define PROT_READ 0x01 /* pages can be read */
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#define PROT_WRITE 0x02 /* pages can be written */
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#define PROT_EXEC 0x04 /* pages can be executed */
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/* flags argument for mmap() */
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#define MAP_PRIVATE 0x0002 /* changes are private */
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#define MAP_ANON 0x0004 /* anonymous memory */
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#define MAP_PREALLOC 0x0008 /* not on-demand */
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#define MAP_CONTIG 0x0010 /* contiguous in physical memory */
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#define MAP_LOWER16M 0x0020 /* physically below 16MB */
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#define MAP_ALIGN64K 0x0040 /* physically aligned at 64kB */
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#define MAP_LOWER1M 0x0080 /* physically below 16MB */
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#define MAP_IPC_SHARED 0x0100 /* used to implement shared memory */
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/* mmap() error return */
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#define MAP_FAILED ((void *)-1)
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_PROTOTYPE( void *mmap, (void *, size_t, int, int, int, off_t));
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_PROTOTYPE( int munmap, (void *, size_t));
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_PROTOTYPE( int munmap_text, (void *, size_t));
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_PROTOTYPE( void *vm_remap, (endpoint_t d, endpoint_t s, void *da,
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void *sa, size_t si));
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_PROTOTYPE( int vm_unmap, (endpoint_t endpt, void *addr));
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_PROTOTYPE( unsigned long vm_getphys, (endpoint_t endpt, void *addr));
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_PROTOTYPE( u8_t vm_getrefcount, (endpoint_t endpt, void *addr));
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#endif /* _MMAN_H */
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