1
2/*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8#include "SkPtrRecorder.h"
9#include "SkTSearch.h"
10
11void SkPtrSet::reset() {
12    Pair* p = fList.begin();
13    Pair* stop = fList.end();
14    while (p < stop) {
15        this->decPtr(p->fPtr);
16        p += 1;
17    }
18    fList.reset();
19}
20
21int SkPtrSet::Cmp(const Pair& a, const Pair& b) {
22    return (char*)a.fPtr - (char*)b.fPtr;
23}
24
25uint32_t SkPtrSet::find(void* ptr) const {
26    if (NULL == ptr) {
27        return 0;
28    }
29
30    int count = fList.count();
31    Pair pair;
32    pair.fPtr = ptr;
33
34    int index = SkTSearch<Pair>(fList.begin(), count, pair, sizeof(pair), &Cmp);
35    if (index < 0) {
36        return 0;
37    }
38    return fList[index].fIndex;
39}
40
41uint32_t SkPtrSet::add(void* ptr) {
42    if (NULL == ptr) {
43        return 0;
44    }
45
46    int count = fList.count();
47    Pair pair;
48    pair.fPtr = ptr;
49
50    int index = SkTSearch<Pair>(fList.begin(), count, pair, sizeof(pair), &Cmp);
51    if (index < 0) {
52        index = ~index; // turn it back into an index for insertion
53        this->incPtr(ptr);
54        pair.fIndex = count + 1;
55        *fList.insert(index) = pair;
56        return count + 1;
57    } else {
58        return fList[index].fIndex;
59    }
60}
61
62void SkPtrSet::copyToArray(void* array[]) const {
63    int count = fList.count();
64    if (count > 0) {
65        SkASSERT(array);
66        const Pair* p = fList.begin();
67        // p->fIndex is base-1, so we need to subtract to find its slot
68        for (int i = 0; i < count; i++) {
69            int index = p[i].fIndex - 1;
70            SkASSERT((unsigned)index < (unsigned)count);
71            array[index] = p[i].fPtr;
72        }
73    }
74}
75
76
77