da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinref -D_def_map_ast=1

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinsys mman

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chintst lib_mmap note{ standard mmap interface that works }end execute{

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <unistd.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <fcntl.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/types.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/mman.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/stat.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/times.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #define MAPSIZE (64*1024)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #define BUFSIZE (8*1024)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #define WRITE (64)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #define Failed(file) (remove(file),1)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin int

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #if _STD_

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin main(int argc, char** argv)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #else

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin main(argc,argv)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin int argc;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin char** argv;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #endif

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin {

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin caddr_t mm;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin char *t, *u, *f;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin int i, fd, okfixed;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin char file[1024], buf[MAPSIZE];

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin struct tms stm, etm;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin clock_t rdtm, mmtm;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* create data file in a local fs if possible */

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin t = file;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (access(f = "/tmp", 0) == 0 ||

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin access(f = "/usr/tmp", 0) == 0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin {

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin while (*t = *f++)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin t++;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin *t++ = '/';

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin u = t;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin f = argv[0];

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin while (*t = *f++)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (*t == '/')

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin t = u;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin else if (*t != '.')

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin t++;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin *t++ = '.'; *t++ = 'D'; *t = 0;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if ((fd = open(file, O_CREAT|O_TRUNC|O_WRONLY, 0666)) < 0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (i = 0; i < sizeof(buf); ++i)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin buf[i] = '0' + (i%10);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (i = 0; i < WRITE; ++i)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (write(fd,buf,sizeof(buf)) != sizeof(buf))

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return Failed(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin close(fd);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* see if can overwrite fixed map */

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #ifndef MAP_VARIABLE

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #define MAP_VARIABLE 0

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #endif

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if ((fd = open(file, O_RDWR)) < 0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return Failed(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin mm = mmap((caddr_t)0, sizeof(buf), (PROT_READ|PROT_WRITE),

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (MAP_PRIVATE|MAP_VARIABLE), fd, 0);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if(mm == (caddr_t)0 || mm == (caddr_t)(-1))

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return Failed(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin mm = mmap(mm, sizeof(buf), (PROT_READ|PROT_WRITE),

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (MAP_PRIVATE|MAP_FIXED), fd, 0);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin okfixed = (mm == (caddr_t)0 || mm == (caddr_t)(-1)) ? 0 : 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin munmap(mm, sizeof(buf));

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin close(fd);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* read time */

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if((fd = open(file, O_RDWR)) < 0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return Failed(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin times(&stm);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (i = 0; i < WRITE; ++i)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (read(fd,buf,BUFSIZE) != BUFSIZE)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return Failed(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin times(&etm);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin close(fd);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin rdtm = (etm.tms_utime-stm.tms_utime) + (etm.tms_stime-stm.tms_stime);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* mmap time */

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if ((fd = open(file, O_RDWR)) < 0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return Failed(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin times(&stm);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for(i = 0, mm = (caddr_t)0; i < WRITE; ++i)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { if(okfixed)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { mm = (caddr_t)mmap(mm, MAPSIZE,

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (PROT_READ|PROT_WRITE),

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (MAP_PRIVATE | (mm ? MAP_FIXED : MAP_VARIABLE)),

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin fd, i*MAPSIZE );

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin else

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { if(mm)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin munmap(mm, MAPSIZE);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin mm = (caddr_t)mmap((caddr_t)0, MAPSIZE,

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (PROT_READ|PROT_WRITE),

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (MAP_PRIVATE|MAP_VARIABLE),

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin fd, i*MAPSIZE );

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if(mm == (caddr_t)(-1) || mm == (caddr_t)0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return Failed(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin times(&etm);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin close(fd);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin remove(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin mmtm = (etm.tms_utime-stm.tms_utime) + (etm.tms_stime-stm.tms_stime);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return rdtm+60 < mmtm ? 1 : 0;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin}end

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chintst lib_mmap64 -D_LARGEFILE64_SOURCE note{ mmap64 interface and implementation work }end execute{

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #if !_lib_mmap

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #endif

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <unistd.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <fcntl.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/types.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/mman.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/stat.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin int

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin main()

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin {

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin off64_t off;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin int fd;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin int n;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin char* s;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin struct stat64 st;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin char file[32] = {'/','t','m','p','/','m','m','X','X','X','X','X','X'};

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* hey, stubs are supposed to fail! */

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (stat64(".", &st) || !st.st_mode || !st.st_mtime)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (!mktemp(file) || (fd = open64(file, O_CREAT|O_WRONLY, 0600)) < 0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin {

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin remove(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin off = (1<<8);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin off *= off;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (lseek64(fd, off, SEEK_SET) != off)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin {

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin remove(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin n = strlen(file) + 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (write(fd, file, n) != n)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin {

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin remove(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (close(fd) < 0 || (fd = open64(file, O_RDWR)) < 0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin {

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin remove(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (!(s = mmap64((caddr_t)0, (size_t)n, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, off)))

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin {

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin remove(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (strcmp(s, file))

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin {

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin remove(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin close(fd);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin remove(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 0;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin}end

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chintst mmap_anon note{ use mmap MAP_ANON to get raw memory }end execute{

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #if !_lib_mmap

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #endif

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <unistd.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <fcntl.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/types.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/mman.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #if defined(MAP_ANONYMOUS) && !defined(MAP_ANON)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #define MAP_ANON MAP_ANONYMOUS

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #endif

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin int

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin main()

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { void *addr;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin addr = mmap(0,1024*1024,PROT_READ|PROT_WRITE,MAP_ANON|MAP_PRIVATE,-1,0);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return (addr && addr != (void*)(-1)) ? 0 : 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin}end

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chintst mmap_devzero note{ use mmap on /dev/zero to get raw memory }end execute{

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #if !_lib_mmap

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #endif

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <unistd.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <fcntl.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/types.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/mman.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin int

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin main()

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { int fd;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin void *addr;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if((fd = open("/dev/zero", O_RDWR)) < 0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin addr = mmap(0,1024*1024,PROT_READ|PROT_WRITE,MAP_PRIVATE,fd,0);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return (addr && addr != (void*)(-1)) ? 0 : 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin}end

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chintst note{ mmap is worth using }end output{

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #if !_lib_mmap

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #endif

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <unistd.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <fcntl.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/types.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/mman.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/stat.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #include <sys/times.h>

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #define MAPSIZE (64*1024)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #define BUFSIZE (MAPSIZE/8)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #define WRITE (64)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #define RUN (64)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #define Failed(file) (remove(file),1)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin int

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #if _STD_

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin main(int argc, char** argv)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #else

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin main(argc,argv)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin int argc;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin char** argv;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #endif

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin {

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin caddr_t mm;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin char *t, *f;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin int i, fd, k, run;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin char file[1024], buf[MAPSIZE];

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin struct tms stm, etm;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin clock_t rdtm, mmtm;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* create data file */

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin f = argv[0]; t = file;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin while (*t = *f++)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin t++;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin *t++ = '.'; *t++ = 'D'; *t = 0;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if ((fd = open(file, O_CREAT|O_TRUNC|O_WRONLY, 0666)) < 0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (i = 0; i < sizeof(buf); ++i)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin buf[i] = '0' + (i%10);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (i = 0; i < WRITE; ++i)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (write(fd,buf,sizeof(buf)) != sizeof(buf))

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return Failed(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin close(fd);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* read time */

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin times(&stm);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for(run = 0; run < RUN; ++run)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { if((fd = open(file, O_RDWR)) < 0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return Failed(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (i = 0; i < WRITE; ++i)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { for(k = 0; k < MAPSIZE; k += BUFSIZE)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (read(fd,buf,BUFSIZE) != BUFSIZE)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return Failed(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin close(fd);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin times(&etm);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin rdtm = (etm.tms_utime-stm.tms_utime) + (etm.tms_stime-stm.tms_stime);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* mmap time */

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin times(&stm);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for(run = 0; run < RUN; ++run)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { if ((fd = open(file, O_RDWR)) < 0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return Failed(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for(i = 0, mm = (caddr_t)0; i < WRITE; ++i)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { if(mm)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin munmap(mm, MAPSIZE);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin mm = (caddr_t)mmap((caddr_t)0, MAPSIZE,

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (PROT_READ|PROT_WRITE),

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin MAP_PRIVATE, fd, i*MAPSIZE );

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if(mm == (caddr_t)(-1) || mm == (caddr_t)0)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return Failed(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* the memcpy is < BUFSIZE to simulate the

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin fact that functions like sfreserve/sfgetr do

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin not do buffer copying.

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin */

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin t = (char*)mm;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for(k = 0; k < MAPSIZE; k += BUFSIZE, t += BUFSIZE)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin memcpy(buf,t,(3*BUFSIZE)/4);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin close(fd);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin times(&etm);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin mmtm = (etm.tms_utime-stm.tms_utime) + (etm.tms_stime-stm.tms_stime);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin remove(file);

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if(4*mmtm <= 3*rdtm)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin printf("#define _mmap_worthy 2 /* mmap is great */\n");

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin else if(4*mmtm <= 5*rdtm)

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin printf("#define _mmap_worthy 1 /* mmap is good */\n");

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin else

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 1;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return 0;

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin}end

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chincat{

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* some systems get it wrong but escape concise detection */

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #ifndef _NO_MMAP

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #if __CYGWIN__

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #define _NO_MMAP 1

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #endif

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #endif

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #if _NO_MMAP

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #undef _lib_mmap

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #undef _lib_mmap64

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #undef _mmap_anon

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #undef _mmap_devzero

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #undef _mmap_worthy

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin #endif

da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin}end