base: Clean up signal handling
Review Request #2035 - Created Oct. 7, 2013 and submitted
Changeset 9906:a64f74eb0d5a --------------------------- base: Clean up signal handling The PollEvent class dynamically installs a SIGIO and SIGALRM handler when a file handler is registered. Most signal handlers currently get registered in the initSignals() function. This changeset moves the SIGIO/SIGALRM handlers to initSignals() to live with the other signal handlers. The original code installs SIGIO and SIGALRM with the SA_RESTART option to prevent syscalls from returning EINTR. This changeset consistently uses this flag for all signal handlers to ensure that other signals that trigger asynchronous behavior (e.g., statistics dumping) do not cause undesirable EINTR returns.
Ran on x86 with KVM. Verified that asynchronous sockets work (terminal).