Analog Devices VISUALDSP++ 3.5 Manual page 368

C Run-Time Library Reference
The function causes the receipt of the signal number
signal
handled in one of the following ways:
•
SIG_DFL
•
SIG_IGN
• Function address—The function pointed to by
The function pointed to by
is received. Handling is then returned to the default state.
Interrupts are not nested by the default start-up file.
Error Conditions
The function returns
signal
not recognize the requested signal.
Example
#include <signal.h>
void handler (int sig) {
}
main () {
/* enable power down interrupt and register ISR */
signal(SIG_PWRDWN, handler);
/* disable power down interrupt */
signal(SIG_PWRDWN, SIG_IGN);
/* enable power down interrupt and register ISR */
signalf(SIG_PWRDWN, handler);
/* disable power down interrupt */
signalf(SIG_PWRDWN, SIG_IGN);
}
3-114
—The default action is taken.
—The signal is ignored.
SIG_ERR
/* Interrupt Service Routine (ISR) */
VisualDSP++ 3.5 C/C++ Compiler and Library Manual
is executed once when the signal
func
and sets to
errno
for ADSP-219x DSPs
to be
sig
is executed.
func
if it does
SIG_ERR