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Cleaned up, fixed and robustified semaphore and signal related code

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This commit is contained in:
Thulinma 2018-11-01 16:11:47 +01:00
parent ee9b076b76
commit 24006648f9
7 changed files with 165 additions and 131 deletions
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26
src/input/input_buffer.cpp
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@ -463,7 +463,7 @@ namespace Mist {
}
//Track is set to "New track request", assign new track id and create shared memory page
//This indicates that the 'current key' part of the element is set to contain the original track id from the pushing process
if (value & 0x80000000) {
if (config->is_active && (value & 0x80000000)) {
if (value & 0x40000000) {
unsigned long finalMap = value & ~0xC0000000;
//Register the new track as an active track.
@ -480,9 +480,15 @@ namespace Mist {
char tempMetaName[NAME_BUFFER_SIZE];
snprintf(tempMetaName, NAME_BUFFER_SIZE, SHM_TRACK_META, config->getString("streamname").c_str(), finalMap);
tMeta.init(tempMetaName, 8388608, false);
tMeta.init(tempMetaName, 8388608, false, false);
if (!tMeta){continue;}//abort for now if page doesn't exist yet
//The page exist, now we try to read in the metadata of the track
char firstPage[NAME_BUFFER_SIZE];
snprintf(firstPage, NAME_BUFFER_SIZE, SHM_TRACK_INDEX, config->getString("streamname").c_str(), finalMap);
nProxy.metaPages[finalMap].init(firstPage, SHM_TRACK_INDEX_SIZE, false, false);
if (!nProxy.metaPages[finalMap]){continue;}//abort for now if page doesn't exist yet
//The pages exist, now we try to read in the metadata of the track
//Store the size of the dtsc packet to read.
unsigned int len = ntohl(((int *)tMeta.mapped)[1]);
@ -505,11 +511,6 @@ namespace Mist {
userConn.setTrackId(index, finalMap);
userConn.setKeynum(index, 0x0000);
char firstPage[NAME_BUFFER_SIZE];
snprintf(firstPage, NAME_BUFFER_SIZE, SHM_TRACK_INDEX, config->getString("streamname").c_str(), finalMap);
nProxy.metaPages[finalMap].init(firstPage, SHM_TRACK_INDEX_SIZE, false);
//Update the metadata for this track
updateTrackMeta(finalMap);
hasPush = true;
@ -536,7 +537,7 @@ namespace Mist {
}
//The track id is set to the value of a track that we are currently negotiating about
if (negotiatingTracks.count(value)) {
if (config->is_active && negotiatingTracks.count(value)) {
//If the metadata page for this track is not yet registered, initialize it
if (!nProxy.metaPages.count(value) || !nProxy.metaPages[value].mapped) {
char tempMetaName[NAME_BUFFER_SIZE];
@ -740,7 +741,10 @@ namespace Mist {
strName = strName.substr(0, (strName.find_first_of("+ ")));
IPC::sharedPage serverCfg(SHM_CONF, DEFAULT_CONF_PAGE_SIZE, false, false); ///< Contains server configuration and capabilities
IPC::semaphore configLock(SEM_CONF, O_CREAT | O_RDWR, ACCESSPERMS, 1);
configLock.wait();
if (!configLock.tryWaitOneSecond()){
INFO_MSG("Aborting stream config refresh: locking took longer than expected");
return false;
}
DTSC::Scan streamCfg = DTSC::Scan(serverCfg.mapped, serverCfg.len).getMember("streams").getMember(strName);
long long tmpNum;
@ -783,8 +787,6 @@ namespace Mist {
resumeMode = tmpNum;
}
configLock.post();
configLock.close();
return true;
}