hydrar/mistserver
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Implemented exponential backoff for shared memory related waits

Browse source
This commit is contained in:
Thulinma 2022-03-21 13:25:55 +01:00
parent 35a54dbd61
commit 9993dfafa2
3 changed files with 25 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

16
lib/shared_memory.cpp
View file

@ -100,7 +100,7 @@ namespace IPC{
}
if (!(*this)){
if (GetLastError() == ERROR_FILE_NOT_FOUND && !noWait){// Error code 2
Util::wait(500);
Util::wait(Util::expBackoffMs(timer-1, 10, 5000));
}else{
break;
}
@ -121,7 +121,7 @@ namespace IPC{
}
if (!(*this)){
if (errno == ENOENT && !noWait){
Util::wait(500);
Util::wait(Util::expBackoffMs(timer-1, 10, 5000));
}else{
break;
}
@ -458,10 +458,10 @@ namespace IPC{
}else{
int i = 0;
do{
if (i != 0){Util::wait(1000);}
if (i != 0){Util::wait(Util::expBackoffMs(i-1, 10, 10000));}
handle = OpenFileMappingA(FILE_MAP_ALL_ACCESS, FALSE, name.c_str());
i++;
}while (i < 10 && !handle && autoBackoff);
}while (i <= 10 && !handle && autoBackoff);
}
if (!handle){
MEDIUM_MSG("%s for page %s failed with error code %u",
@ -489,9 +489,9 @@ namespace IPC{
handle = shm_open(name.c_str(), O_CREAT | O_RDWR, ACCESSPERMS);
}else{
int i = 0;
while (i < 10 && handle == -1 && autoBackoff){
while (i < 11 && handle == -1 && autoBackoff){
i++;
Util::wait(1000);
Util::wait(Util::expBackoffMs(i-1, 10, 10000));
handle = shm_open(name.c_str(), O_RDWR, ACCESSPERMS);
}
}
@ -620,9 +620,9 @@ namespace IPC{
O_CREAT | O_TRUNC | O_RDWR, (mode_t)0600);
}else{
int i = 0;
while (i < 10 && handle == -1 && autoBackoff){
while (i < 11 && handle == -1 && autoBackoff){
i++;
Util::wait(1000);
Util::wait(Util::expBackoffMs(i-1, 10, 10000));
handle = open(std::string(Util::getTmpFolder() + name).c_str(), O_RDWR, (mode_t)0600);
}
}