buckets/ap_buckets_mmap.c

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#include "httpd.h"
#include "ap_buckets.h"
#include <stdlib.h>

static apr_status_t mmap_read(ap_bucket *b, const char **str, 
			      apr_size_t *length, ap_read_type block)
{
    ap_bucket_shared *s = b->data;
    ap_bucket_mmap *m = s->data;
    apr_status_t ok;
    void *addr;
    
    ok = apr_mmap_offset(&addr, m->mmap, s->start);
    if (ok != APR_SUCCESS) {
	return ok;
    }
    *str = addr;
    *length = s->end - s->start;
    return APR_SUCCESS;
}

static void mmap_destroy(void *data)
{
    ap_bucket_mmap *m;

    m = ap_bucket_destroy_shared(data);
    if (m == NULL) {
	return;
    }
    free(m);
}

/*
 * XXX: are the start and length arguments useful?
 */
AP_DECLARE(ap_bucket *) ap_bucket_make_mmap(ap_bucket *b,
		apr_mmap_t *mm, apr_off_t start, apr_size_t length)
{
    ap_bucket_mmap *m;

    m = malloc(sizeof(*m));
    if (m == NULL) {
	return NULL;
    }
    m->mmap = mm;

    b = ap_bucket_make_shared(b, m, start, start+length);
    if (b == NULL) {
	free(m);
	return NULL;
    }

    b->type     = &ap_mmap_type;

    return b;
}


AP_DECLARE(ap_bucket *) ap_bucket_create_mmap(
		apr_mmap_t *mm, apr_off_t start, apr_size_t length)
{
    ap_bucket_do_create(ap_bucket_make_mmap(b, mm, start, length));
}

const ap_bucket_type ap_mmap_type = {
    "MMAP", 4,
    mmap_destroy,
    mmap_read,
    ap_bucket_setaside_notimpl,
    ap_bucket_split_shared
};