add mmap library.
parent
ad78d69f48
commit
84cd4773f4
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#ifndef MMAP_H
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#define MMAP_H
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#include <sys/cdefs.h>
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/* open file for reading, mmap whole file, close file, write length of
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* map in filesize and return pointer to map. */
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extern char* mmap_read(const char *filename,unsigned long* filesize) __THROW;
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/* open file for writing, mmap whole file privately (copy on write),
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* close file, write length of map in filesize and return pointer to
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* map. */
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extern int mmap_write(const char *filename,unsigned long* filesize) __THROW;
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/* open file for writing, mmap whole file shared, close file, write
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* length of map in filesize and return pointer to map. */
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extern int mmap_shared(const char *filename,unsigned long* filesize) __THROW;
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#endif
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include "open.h"
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#include "mmap.h"
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extern char* mmap_private(const char* filename,unsigned long* filesize) {
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int fd=open_read(filename);
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char *map;
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if (fd>=0) {
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*filesize=lseek(fd,0,SEEK_END);
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map=mmap(0,*filesize,PROT_WRITE,MAP_PRIVATE,fd,0);
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if (map==(char*)-1)
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map=0;
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close(fd);
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return map;
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}
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return 0;
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}
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include "open.h"
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#include "mmap.h"
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extern char* mmap_read(const char* filename,unsigned long* filesize) {
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int fd=open_read(filename);
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char *map;
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if (fd>=0) {
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*filesize=lseek(fd,0,SEEK_END);
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map=mmap(0,*filesize,PROT_READ,MAP_SHARED,fd,0);
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if (map==(char*)-1)
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map=0;
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close(fd);
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return map;
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}
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return 0;
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}
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include "open.h"
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#include "mmap.h"
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extern char* mmap_private(const char* filename,unsigned long* filesize) {
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int fd=open_read(filename);
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char *map;
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if (fd>=0) {
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*filesize=lseek(fd,0,SEEK_END);
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map=mmap(0,*filesize,PROT_WRITE,MAP_SHARED,fd,0);
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if (map==(char*)-1)
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map=0;
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close(fd);
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return map;
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}
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return 0;
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}
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