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Semaphore optimize

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This commit is contained in:
Thulinma 2016-12-28 16:47:30 +01:00
parent 1b80cfbb20
commit 5da2c40e00
1 changed files with 14 additions and 12 deletions
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26
lib/shared_memory.cpp
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@ -873,7 +873,6 @@ namespace IPC {
empty = (char *)malloc(payLen * sizeof(char));
memset(empty, 0, payLen);
}
semGuard tmpGuard(&mySemaphore);
unsigned int id = 0;
for (std::deque<sharedPage>::iterator it = myPages.begin(); it != myPages.end(); it++) {
if (!it->mapped || !it->len) {
@ -911,7 +910,6 @@ namespace IPC {
empty = (char *)malloc(payLen * sizeof(char));
memset(empty, 0, payLen);
}
semGuard tmpGuard(&mySemaphore);
unsigned int id = 0;
unsigned int userCount = 0;
unsigned int emptyCount = 0;
@ -940,7 +938,7 @@ namespace IPC {
VERYHIGH_MSG("Shared memory %s is now at count %u", baseName.c_str(), amount);
}
uint32_t tmpPID = *((uint32_t *)(it->mapped + 1 + offset + payLen - 4));
if (!Util::Procs::isRunning(tmpPID) && !(countNum == 126 || countNum == 127)){
if (tmpPID > 1 && !Util::Procs::isRunning(tmpPID) && !(countNum == 126 || countNum == 127)){
WARN_MSG("process disappeared, timing out. (pid %lu)", tmpPID);
*counter = 125 | (0x80 & (*counter)); //if process is already dead, instant timeout.
}
@ -954,7 +952,7 @@ namespace IPC {
break;
default:
#ifndef NOCRASHCHECK
if (tmpPID) {
if (tmpPID > 1) {
if (countNum > 10 && countNum < 60) {
if (countNum < 30) {
if (countNum > 15) {
@ -982,6 +980,7 @@ namespace IPC {
break;
}
if (countNum == 127 || countNum == 126){
semGuard tmpGuard(&mySemaphore);
if (disconCallback){
disconCallback(it->mapped + offset + 1, payLen, id);
}
@ -1039,8 +1038,10 @@ namespace IPC {
}
if (emptyCount > 1) {
semGuard tmpGuard(&mySemaphore);
deletePage();
} else if (!emptyCount) {
semGuard tmpGuard(&mySemaphore);
newPage();
}
@ -1075,7 +1076,6 @@ namespace IPC {
DEBUG_MSG(DLVL_FAIL, "Creating semaphore failed: %s", strerror(errno));
return;
}
semGuard tmpGuard(&mySemaphore);
myPage.init(rhs.myPage.name, rhs.myPage.len, rhs.myPage.master);
offsetOnPage = rhs.offsetOnPage;
}
@ -1096,7 +1096,6 @@ namespace IPC {
DEBUG_MSG(DLVL_FAIL, "Creating copy of semaphore %s failed: %s", baseName.c_str(), strerror(errno));
return;
}
semGuard tmpGuard(&mySemaphore);
myPage.init(rhs.myPage.name, rhs.myPage.len, rhs.myPage.master);
offsetOnPage = rhs.offsetOnPage;
}
@ -1129,7 +1128,6 @@ namespace IPC {
}
while (offsetOnPage == -1) {
{
semGuard tmpGuard(&mySemaphore);
for (char i = 'A'; i <= 'Z'; i++) {
myPage.init(baseName.substr(1) + i, (4096 << (i - 'A')), false, false);
if (!myPage.mapped) {
@ -1138,12 +1136,16 @@ namespace IPC {
int offset = 0;
while (offset + payLen + (hasCounter ? 1 : 0) <= myPage.len) {
if ((hasCounter && myPage.mapped[offset] == 0) || (!hasCounter && !memcmp(myPage.mapped + offset, empty, payLen))) {
offsetOnPage = offset;
if (hasCounter) {
myPage.mapped[offset] = 1;
*((uint32_t *)(myPage.mapped + 1 + offset + len - 4)) = getpid();
semGuard tmpGuard(&mySemaphore);
if ((hasCounter && myPage.mapped[offset] == 0) || (!hasCounter && !memcmp(myPage.mapped + offset, empty, payLen))) {
offsetOnPage = offset;
if (hasCounter) {
myPage.mapped[offset] = 1;
*((uint32_t *)(myPage.mapped + 1 + offset + len - 4)) = getpid();
HIGH_MSG("sharedClient received ID %d", offsetOnPage/(payLen+1));
}
break;
}
break;
}
offset += payLen + (hasCounter ? 1 : 0);
}