diff options
Diffstat (limited to 'mcon/U/d_mmap.U')
| -rw-r--r-- | mcon/U/d_mmap.U | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/mcon/U/d_mmap.U b/mcon/U/d_mmap.U new file mode 100644 index 0000000..b2f671f --- /dev/null +++ b/mcon/U/d_mmap.U @@ -0,0 +1,53 @@ +?RCS: $Id$ +?RCS: +?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi +?RCS: +?RCS: You may redistribute only under the terms of the Artistic License, +?RCS: as specified in the README file that comes with the distribution. +?RCS: You may reuse parts of this distribution only within the terms of +?RCS: that same Artistic License; a copy of which may be found at the root +?RCS: of the source tree for dist 4.0. +?RCS: +?RCS: $Log: d_mmap.U,v $ +?RCS: Revision 3.0.1.1 1993/12/15 08:19:12 ram +?RCS: patch15: created +?RCS: +?MAKE:d_mmap: Trylink cat i_sysmman +?MAKE: -pick add $@ %< +?S:d_mmap: +?S: This variable conditionally defines HAS_MMAP if mmap() is +?S: available to map a file into memory. +?S:. +?C:HAS_MMAP: +?C: This symbol, if defined, indicates that the mmap system call is +?C: available to map a file into memory. +?C:. +?H:#$d_mmap HAS_MMAP /**/ +?H:. +?LINT:set d_mmap +: see if mmap exists +$cat >try.c <<EOC +#include <sys/types.h> +#$i_sysmman I_SYS_MMAN +#ifdef I_SYS_MMAN +#include <sys/mman.h> +#endif +int main(void) +{ + static off_t offset; + static void *addr; + static size_t len; + static int flags, fd, prot; + void *p; + flags |= PROT_NONE; + flags |= PROT_READ; + flags |= PROT_WRITE; + flags |= PROT_EXEC; + p = mmap(addr, len, prot, flags, fd, offset); + return p ? 0 : 1; +} +EOC +cyn=mmap +set d_mmap +eval $trylink + |