adding

[thirdparty/squid.git] / src / fd.cc

#include "squid.h"

static void fdUpdateBiggest _PARAMS((int fd, unsigned int status));

static void
fdUpdateBiggest(int fd, unsigned int status)
{
    if (fd < Biggest_FD)
	return;
    if (fd >= Squid_MaxFD) {
	debug_trap("Running out of file descriptors.\n");
	return;
    }
    if (fd > Biggest_FD) {
	if (status == FD_OPEN)
	    Biggest_FD = fd;
	else
	    debug_trap("Biggest_FD inconsistency");
	return;
    }
    /* if we are here, then fd == Biggest_FD */
    if (status != FD_CLOSE) {
	debug_trap("re-opening Biggest_FD?");
	return;
    }
    while (fd_table[Biggest_FD].open != FD_OPEN)
	Biggest_FD--;
}

void
fd_close (int fd)
{
    FD_ENTRY *fde = &fd_table[fd];
    fdUpdateBiggest(fd, FD_CLOSE);
    memset(fde, '\0', sizeof(FD_ENTRY));
    fde->timeout = 0;
}

void
fd_open(int fd, unsigned int type, const char *desc)
{
    FD_ENTRY *fde = &fd_table[fd];
    fde->type = type;
    fdUpdateBiggest(fd, fde->open = FD_OPEN);
    if (desc)
        xstrncpy(fde->desc, desc, FD_DESC_SZ);
}

void
fd_note(int fd, const char *s)
{
    FD_ENTRY *fde = &fd_table[fd];
    xstrncpy(fde->desc, s, FD_DESC_SZ);
}