C++ (Cpp) fmap_unneed_page Examples

Example #1

File: fmap.c Project: dreamee21/SomaVaccine

void fmap_unneed_off(fmap_t *m, size_t at, size_t len) {
    unsigned int i, first_page, last_page;
    if(m->dumb) return;
    if(!len) {
	cli_warnmsg("fmap_unneed: attempted void unneed\n");
	return;
    }

    if(!CLI_ISCONTAINED(0, m->len, at, len)) {
	cli_warnmsg("fmap: attempted oof unneed\n");
	return;
    }

    first_page = fmap_which_page(m, at);
    last_page = fmap_which_page(m, at + len - 1);

    for(i=first_page; i<=last_page; i++) {
	fmap_unneed_page(m, i);
    }
}

Example #2

File: fmap.c Project: CyberIntelMafia/clamav-devel

static void handle_unneed_off(fmap_t *m, size_t at, size_t len) {
    unsigned int i, first_page, last_page;
    if(!m->aging) return;
    if(!len) {
	cli_warnmsg("fmap_unneed: attempted void unneed\n");
	return;
    }

    at += m->nested_offset;
    if(!CLI_ISCONTAINED(0, m->real_len, at, len)) {
	cli_warnmsg("fmap: attempted oof unneed\n");
	return;
    }

    first_page = fmap_which_page(m, at);
    last_page = fmap_which_page(m, at + len - 1);

    for(i=first_page; i<=last_page; i++) {
	fmap_unneed_page(m, i);
    }
}

Example #3

File: fmap.c Project: CyberIntelMafia/clamav-devel

static const void *handle_need_offstr(fmap_t *m, size_t at, size_t len_hint) {
    unsigned int i, first_page, last_page;
    void *ptr = (void *)((char *)m + m->hdrsz + at);

    if(!len_hint || len_hint > m->real_len - at)
	len_hint = m->real_len - at;

    if(!CLI_ISCONTAINED(0, m->real_len, at, len_hint))
	return NULL;

    fmap_aging(m);

    first_page = fmap_which_page(m, at);
    last_page = fmap_which_page(m, at + len_hint - 1);

    for(i=first_page; i<=last_page; i++) {
	char *thispage = (char *)m + m->hdrsz + i * m->pgsz;
	unsigned int scanat, scansz;

	if(fmap_readpage(m, i, 1, 1)) {
	    last_page = i-1;
	    break;
	}
	if(i == first_page) {
	    scanat = at % m->pgsz;
	    scansz = MIN(len_hint, m->pgsz - scanat);
	} else {
	    scanat = 0;
	    scansz = MIN(len_hint, m->pgsz);
	}
	len_hint -= scansz;
	if(memchr(&thispage[scanat], 0, scansz))
	    return ptr;
    }
    for(i=first_page; i<=last_page; i++)
	fmap_unneed_page(m, i);
    return NULL;
}