empire/empserver
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

(lwpInitSelect): The code to query the system's limit on file

Browse source 
descriptors was not portable.  Simply use FD_SETSIZE instead.  The
lower of the two applies, so this wastes storage if the system's limit
is significantly below FD_SETSIZE.  Not an issue, as FD_SETSIZE is
fairly small.
(lwpSleepFd): Return if fd is too large.  Returning isn't nice,
but better than the buffer overruns in the old code.
(lwpSelect): Member nfile unused, remove.
This commit is contained in:
Markus Armbruster 2005-12-27 19:22:07 +00:00
parent 3aebb68ee7
commit 083f0ea350
1 changed files with 3 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

15
src/lib/lwp/sel.c
View file

@ -41,11 +41,6 @@
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#ifdef hpux
#include <stdio.h>
#endif
#include "lwp.h"
#include "lwpint.h"
@ -54,7 +49,6 @@
struct lwpSelect {
int maxfd;
int nfds;
int nfile;
fd_set readmask;
fd_set writemask;
struct lwpProc **wait;
@ -69,14 +63,9 @@ lwpInitSelect(struct lwpProc *proc)
{
LwpSelect.maxfd = 0;
LwpSelect.nfds = 0;
#ifdef hpux
LwpSelect.nfile = _NFILE;
#else
LwpSelect.nfile = getdtablesize();
#endif
FD_ZERO(&LwpSelect.readmask);
FD_ZERO(&LwpSelect.writemask);
LwpSelect.wait = calloc(LwpSelect.nfile, sizeof(char *));
LwpSelect.wait = calloc(FD_SETSIZE, sizeof(struct lwpProc *));
LwpSelect.delayq.head = 0;
LwpSelect.delayq.tail = 0;
LwpSelect.proc = proc;
@ -87,6 +76,8 @@ lwpSleepFd(int fd, int mask)
{
lwpStatus(LwpCurrent, "sleeping on fd %d for %d", fd, mask);
if (CANT_HAPPEN(fd > FD_SETSIZE))
return;
if (LwpSelect.wait[fd] != 0) {
lwpStatus(LwpCurrent,
"multiple sleeps attempted on file descriptor %d", fd);