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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">//</span>
<a name="l00002"></a>00002 <span class="comment">// Copyright 2011 Jeff Verkoeyen</span>
<a name="l00003"></a>00003 <span class="comment">//</span>
<a name="l00004"></a>00004 <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span>
<a name="l00005"></a>00005 <span class="comment">// you may not use this file except in compliance with the License.</span>
<a name="l00006"></a>00006 <span class="comment">// You may obtain a copy of the License at</span>
<a name="l00007"></a>00007 <span class="comment">//</span>
<a name="l00008"></a>00008 <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span>
<a name="l00009"></a>00009 <span class="comment">//</span>
<a name="l00010"></a>00010 <span class="comment">// Unless required by applicable law or agreed to in writing, software</span>
<a name="l00011"></a>00011 <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span>
<a name="l00012"></a>00012 <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<a name="l00013"></a>00013 <span class="comment">// See the License for the specific language governing permissions and</span>
<a name="l00014"></a>00014 <span class="comment">// limitations under the License.</span>
<a name="l00015"></a>00015 <span class="comment">//</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="preprocessor">#import "NINetworkActivity.h"</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#import "NIDebuggingTools.h"</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#import "NIRuntimeClassModifications.h"</span>
<a name="l00023"></a>00023 <span class="preprocessor">#endif</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span>
<a name="l00025"></a>00025 <span class="preprocessor">#import <pthread.h></span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="keyword">static</span> <span class="keywordtype">int</span> gNetworkTaskCount = 0;
<a name="l00028"></a>00028 <span class="keyword">static</span> pthread_mutex_t gMutex = PTHREAD_MUTEX_INITIALIZER;
<a name="l00029"></a>00029
<a name="l00031"></a><a class="code" href="group___network-_activity.html#ga3e923f142d5a8fc6fab084c6ab215750">00031</a> <span class="keywordtype">void</span> <a class="code" href="group___network-_activity.html#ga3e923f142d5a8fc6fab084c6ab215750" title="Increment the number of active network tasks.">NINetworkActivityTaskDidStart</a>(<span class="keywordtype">void</span>) {
<a name="l00032"></a>00032 pthread_mutex_lock(&gMutex);
<a name="l00033"></a>00033
<a name="l00034"></a>00034 BOOL enableNetworkActivityIndicator = (0 == gNetworkTaskCount);
<a name="l00035"></a>00035
<a name="l00036"></a>00036 ++gNetworkTaskCount;
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="keywordflow">if</span> (enableNetworkActivityIndicator) {
<a name="l00039"></a>00039 [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
<a name="l00040"></a>00040 }
<a name="l00041"></a>00041
<a name="l00042"></a>00042 pthread_mutex_unlock(&gMutex);
<a name="l00043"></a>00043 }
<a name="l00044"></a>00044
<a name="l00045"></a>00045
<a name="l00047"></a><a class="code" href="group___network-_activity.html#ga2c80c44ffd1d89dfffa834864d7f64c1">00047</a> <span class="keywordtype">void</span> <a class="code" href="group___network-_activity.html#ga2c80c44ffd1d89dfffa834864d7f64c1" title="Decrement the number of active network tasks.">NINetworkActivityTaskDidFinish</a>(<span class="keywordtype">void</span>) {
<a name="l00048"></a>00048 pthread_mutex_lock(&gMutex);
<a name="l00049"></a>00049
<a name="l00050"></a>00050 --gNetworkTaskCount;
<a name="l00051"></a>00051 <span class="comment">// If this asserts, you don't have enough stop requests to match your start requests.</span>
<a name="l00052"></a>00052 <a class="code" href="group___debugging-_tools.html#ga13cc3ae82820ea8141bc319bcb76ab7f" title="Assertions that only fire when DEBUG is defined.">NIDASSERT</a>(gNetworkTaskCount >= 0);
<a name="l00053"></a>00053 gNetworkTaskCount = MAX(0, gNetworkTaskCount);
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="keywordflow">if</span> (gNetworkTaskCount == 0) {
<a name="l00056"></a>00056 [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058
<a name="l00059"></a>00059 pthread_mutex_unlock(&gMutex);
<a name="l00060"></a>00060 }
<a name="l00061"></a>00061
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="preprocessor">#pragma mark -</span>
<a name="l00064"></a>00064 <span class="preprocessor"></span><span class="preprocessor">#pragma mark Network Activity Debugging</span>
<a name="l00065"></a>00065 <span class="preprocessor"></span>
<a name="l00066"></a>00066 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00067"></a>00067 <span class="preprocessor"></span>
<a name="l00068"></a>00068 <span class="keyword">static</span> BOOL gNetworkActivityDebuggingEnabled = NO;
<a name="l00069"></a>00069
<a name="l00070"></a>00070 <span class="keywordtype">void</span> NISwizzleMethodsForNetworkActivityDebugging(<span class="keywordtype">void</span>);
<a name="l00071"></a>00071
<a name="l00074"></a>00074 <span class="keyword">@implementation </span>UIApplication (NimbusNetworkActivityDebugging)
<a name="l00075"></a>00075
<a name="l00076"></a>00076
<a name="l00078"></a>00078 - (void)nimbusDebugSetNetworkActivityIndicatorVisible:(BOOL)visible {
<a name="l00079"></a>00079 <span class="comment">// This method will only be used when swizzled, so this will actually call</span>
<a name="l00080"></a>00080 <span class="comment">// setNetworkActivityIndicatorVisible:</span>
<a name="l00081"></a>00081 [<span class="keyword">self</span> nimbusDebugSetNetworkActivityIndicatorVisible:visible];
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="comment">// Sanity check that this method isn't being called directly when debugging isn't enabled.</span>
<a name="l00084"></a>00084 <a class="code" href="group___debugging-_tools.html#ga13cc3ae82820ea8141bc319bcb76ab7f" title="Assertions that only fire when DEBUG is defined.">NIDASSERT</a>(gNetworkActivityDebuggingEnabled);
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="comment">// If either of the following assertions fail then you should look at the call stack to</span>
<a name="l00087"></a>00087 <span class="comment">// determine what code is erroneously calling setNetworkActivityIndicatorVisible: directly.</span>
<a name="l00088"></a>00088 <span class="keywordflow">if</span> (visible) {
<a name="l00089"></a>00089 <span class="comment">// The only time we should be enabling the network activity indicator is when the task</span>
<a name="l00090"></a>00090 <span class="comment">// count is one.</span>
<a name="l00091"></a>00091 <a class="code" href="group___debugging-_tools.html#ga13cc3ae82820ea8141bc319bcb76ab7f" title="Assertions that only fire when DEBUG is defined.">NIDASSERT</a>(1 == gNetworkTaskCount);
<a name="l00092"></a>00092
<a name="l00093"></a>00093 } <span class="keywordflow">else</span> {
<a name="l00094"></a>00094 <span class="comment">// The only time we should be disabling the network activity indicator is when the task</span>
<a name="l00095"></a>00095 <span class="comment">// count is zero.</span>
<a name="l00096"></a>00096 <a class="code" href="group___debugging-_tools.html#ga13cc3ae82820ea8141bc319bcb76ab7f" title="Assertions that only fire when DEBUG is defined.">NIDASSERT</a>(0 == gNetworkTaskCount);
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="keyword">@end</span>
<a name="l00102"></a>00102
<a name="l00103"></a>00103
<a name="l00105"></a>00105 <span class="keywordtype">void</span> NISwizzleMethodsForNetworkActivityDebugging(<span class="keywordtype">void</span>) {
<a name="l00106"></a>00106 <a class="code" href="group___runtime-_class-_modifications.html#gac41d32344f050e0adc00a6ccc7e67b4e" title="Swap two class instance method implementations.">NISwapInstanceMethods</a>([UIApplication <span class="keyword">class</span>],
<a name="l00107"></a>00107 <span class="keyword">@selector</span>(setNetworkActivityIndicatorVisible:),
<a name="l00108"></a>00108 <span class="keyword">@selector</span>(nimbusDebugSetNetworkActivityIndicatorVisible:));
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110
<a name="l00111"></a>00111
<a name="l00113"></a><a class="code" href="group___network-_activity.html#ga2793f13bdaa6cbec2d67752e994918a4">00113</a> <span class="keywordtype">void</span> <a class="code" href="group___network-_activity.html#ga2793f13bdaa6cbec2d67752e994918a4" title="Enable network activity debugging.">NIEnableNetworkActivityDebugging</a>(<span class="keywordtype">void</span>) {
<a name="l00114"></a>00114 <span class="keywordflow">if</span> (!gNetworkActivityDebuggingEnabled) {
<a name="l00115"></a>00115 gNetworkActivityDebuggingEnabled = YES;
<a name="l00116"></a>00116 NISwizzleMethodsForNetworkActivityDebugging();
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118 }
<a name="l00119"></a>00119
<a name="l00120"></a>00120
<a name="l00122"></a><a class="code" href="group___network-_activity.html#ga3839c61537abef204dcaaab5148446e3">00122</a> <span class="keywordtype">void</span> <a class="code" href="group___network-_activity.html#ga3839c61537abef204dcaaab5148446e3" title="Disable network activity debugging.">NIDisableNetworkActivityDebugging</a>(<span class="keywordtype">void</span>) {
<a name="l00123"></a>00123 <span class="keywordflow">if</span> (gNetworkActivityDebuggingEnabled) {
<a name="l00124"></a>00124 gNetworkActivityDebuggingEnabled = NO;
<a name="l00125"></a>00125 NISwizzleMethodsForNetworkActivityDebugging();
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127 }
<a name="l00128"></a>00128
<a name="l00129"></a>00129
<a name="l00130"></a>00130 <span class="preprocessor">#else // #ifndef DEBUG</span>
<a name="l00131"></a>00131 <span class="preprocessor"></span>
<a name="l00132"></a>00132
<a name="l00134"></a>00134 <span class="keywordtype">void</span> <a class="code" href="group___network-_activity.html#ga2793f13bdaa6cbec2d67752e994918a4" title="Enable network activity debugging.">NIEnableNetworkActivityDebugging</a>(<span class="keywordtype">void</span>) {
<a name="l00135"></a>00135 <span class="comment">// No-op</span>
<a name="l00136"></a>00136 }
<a name="l00137"></a>00137
<a name="l00138"></a>00138
<a name="l00140"></a>00140 <span class="keywordtype">void</span> <a class="code" href="group___network-_activity.html#ga3839c61537abef204dcaaab5148446e3" title="Disable network activity debugging.">NIDisableNetworkActivityDebugging</a>(<span class="keywordtype">void</span>) {
<a name="l00141"></a>00141 <span class="comment">// No-op</span>
<a name="l00142"></a>00142 }
<a name="l00143"></a>00143
<a name="l00144"></a>00144
<a name="l00145"></a>00145 <span class="preprocessor">#endif // #ifdef DEBUG</span>
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