Search results
Results from the WOW.Com Content Network
A signal handler is a function which is called by the target environment when the corresponding signal occurs. The target environment suspends execution of the program until the signal handler returns or calls longjmp(). Signal handlers can be set with signal() or sigaction().
The signal number is passed as an integer argument to this function. The sa_mask member specifies additional signals to be blocked during the execution of signal handler. sa_mask must be initialized with sigemptyset(3). The sa_flags member specifies some additional flags. sa_sigaction is an alternate signal handler with different set of parameters.
Signal handlers should be written in a way that does not result in any unwanted side-effects, e.g. errno alteration, signal mask alteration, signal disposition change, and other global process attribute changes. Use of non-reentrant functions, e.g., malloc or printf, inside signal handlers is also unsafe.
setjmp.h is a header defined in the C standard library to provide "non-local jumps": control flow that deviates from the usual subroutine call and return sequence. The complementary functions setjmp and longjmp provide this functionality.
The solution arrived at by POSIX is the pselect() call, which is similar to select() but takes an additional sigmask parameter, which describes a signal mask. This allows an application to mask signals in the main task, then remove the mask for the duration of the select() call such that signal handlers are only called while the application is ...
The signal/slot system fits well with the way graphical user interfaces are designed. [ citation needed ] Similarly, the signal/slot system can be used for other non-GUI usages, for example asynchronous I/O (including sockets, pipes, serial devices, etc.) event notification or to associate timeout events with appropriate object instances and ...
Jay-Z, the star rapper and entrepreneur whose real name is Shawn Carter, was accused in a lawsuit Sunday of raping a 13-year-old girl in 2000 allegedly along with Sean “Diddy” Combs.
The parts of this definition relating to signal handlers are idiosyncratic to C++ and are not typical of definitions of data race. The paper Detecting Data Races on Weak Memory Systems [7] provides a different definition: "two memory operations conflict if they access the same location and at least one of them is a write operation...