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Throw exception with more helpful error message when shmctl fails

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Patrick Niklaus 2017-01-13 15:56:36 +00:00 committed by Patrick Niklaus
parent 71044e88f3
commit dbd70d4884
1 changed files with 26 additions and 1 deletions
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27
include/storage/shared_memory.hpp
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@ -111,10 +111,35 @@ class SharedMemory
{
auto shmid = shm.get_shmid();
::shmid_ds xsi_ds;
const auto errorToMessage = [](int error) -> std::string {
switch (error)
{
case EPERM:
return "EPERM";
break;
case EACCES:
return "ACCESS";
break;
case EINVAL:
return "EINVAL";
break;
case EFAULT:
return "EFAULT";
break;
default:
return "Unknown Error " + std::to_string(error);
break;
}
};
do
{
int ret = ::shmctl(shmid, IPC_STAT, &xsi_ds);
(void)ret; // no unused warning
if (ret < 0)
{
throw util::exception("shmctl encountered an error: " + errorToMessage(ret) +
SOURCE_REF);
}
BOOST_ASSERT(ret >= 0);
std::this_thread::sleep_for(std::chrono::microseconds(100));