ui/common/document.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2017 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "document.h"

#include <cx/hash_map.h>
#include <cx/mempool.h>


void* ui_document_new(size_t size) {
    CxMempool *mp = cxMempoolCreateSimple(256);
    const CxAllocator *a = mp->allocator;
    UiContext *ctx = uic_context(NULL, mp);
    
    UiDoc *document = cxCalloc(a, sizeof(UiDoc) + size, 1);
    document->ctx = ctx;
    return &document->doc;
}

void ui_document_destroy(void *doc) {
    uic_context_destroy(ui_document_context(doc), doc);
}

void ui_document_ref(void *doc) {
    UiContext *ctx = ui_document_context(doc);
    if(ctx) {
        ctx->ref++;
    }
}

void ui_document_unref(void *doc) {
    UiContext *ctx = ui_document_context(doc);
    if(ctx) {
        if(--ctx->ref == 0) {
            uic_context_destroy(ctx, doc);
        }
    }
}

UiContext* ui_document_context(void *doc) {
    if(doc) {
        char *docPtr = doc;
        UiDoc *document = (UiDoc*)(docPtr - sizeof(void*));
        return document->ctx;
    } else {
        return NULL;
    }
}