1/*
2* Copyright (c) 2014, 2016, The Linux Foundation. All rights reserved.
3*
4* Redistribution and use in source and binary forms, with or without modification, are permitted
5* provided that the following conditions are met:
6*    * Redistributions of source code must retain the above copyright notice, this list of
7*      conditions and the following disclaimer.
8*    * Redistributions in binary form must reproduce the above copyright notice, this list of
9*      conditions and the following disclaimer in the documentation and/or other materials provided
10*      with the distribution.
11*    * Neither the name of The Linux Foundation nor the names of its contributors may be used to
12*      endorse or promote products derived from this software without specific prior written
13*      permission.
14*
15* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
17* NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
18* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
19* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
21* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
22* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23*/
24
25#include <stdarg.h>
26#include <stdio.h>
27#include <string.h>
28#include <utils/constants.h>
29
30#include "dump_impl.h"
31
32namespace sdm {
33
34DumpImpl* DumpImpl::dump_list_[] = { 0 };
35uint32_t DumpImpl::dump_count_ = 0;
36
37DisplayError DumpInterface::GetDump(char *buffer, uint32_t length) {
38  if (!buffer || !length) {
39    return kErrorParameters;
40  }
41
42  buffer[0] = '\0';
43  DumpImpl::AppendString(buffer, length, "\n-------- Snapdragon Display Manager --------");
44  for (uint32_t i = 0; i < DumpImpl::dump_count_; i++) {
45    DumpImpl::dump_list_[i]->AppendDump(buffer, length);
46  }
47  DumpImpl::AppendString(buffer, length, "\n\n");
48
49  return kErrorNone;
50}
51
52DumpImpl::DumpImpl() {
53  Register(this);
54}
55
56DumpImpl::~DumpImpl() {
57  Unregister(this);
58}
59
60void DumpImpl::AppendString(char *buffer, uint32_t length, const char *format, ...) {
61  uint32_t filled = UINT32(strlen(buffer));
62  // Reserve one byte for null terminating character
63  if ((filled + 1) >= length) {
64    return;
65  }
66  buffer += filled;
67
68  va_list list;
69  va_start(list, format);
70  vsnprintf(buffer, length - filled -1, format, list);
71}
72
73// Every object is created or destroyed through display core only, which itself protects the
74// the access, so no need to protect registration or de-registration.
75void DumpImpl::Register(DumpImpl *dump_impl) {
76  if (dump_count_ < kMaxDumpObjects) {
77    dump_list_[dump_count_] = dump_impl;
78    dump_count_++;
79  }
80}
81
82void DumpImpl::Unregister(DumpImpl *dump_impl) {
83  for (uint32_t i = 0; i < dump_count_; i++) {
84    if (dump_list_[i] == dump_impl) {
85      dump_count_--;
86      for (; i < dump_count_; i++) {
87        dump_list_[i] = dump_list_[i + 1];
88      }
89    }
90  }
91}
92
93}  // namespace sdm
94
95