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how to discard instruction from previous signal


 
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# 8  
Old 08-09-2009
Thank you matrixmadhan,

You're right. There would be potential bugs with the asynchronous signal approach. I'm thinking and trying shared memory for the problem.

Thank you all.

Best regards

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Test Your Knowledge in Computers #668
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IEEE 802.11 is part of the IEEE 802 set of LAN protocols, and specifies the set of media access control (MAC) and physical layer (PHY) protocols for implementing virtual local area network (VLAN) Wi-Fi computer communication in various frequencies.
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SYSV_SIGNAL(3)						     Linux Programmer's Manual						    SYSV_SIGNAL(3)

NAME
sysv_signal - signal handling with System V semantics SYNOPSIS
#define _GNU_SOURCE #include <signal.h> typedef void (*sighandler_t)(int); sighandler_t sysv_signal(int signum, sighandler_t handler); DESCRIPTION
The sysv_signal() function takes the same arguments, and performs the same task, as signal(2). However sysv_signal() provides the System V unreliable signal semantics, that is: a) the disposition of the signal is reset to the default when the handler is invoked; b) delivery of further instances of the signal is not blocked while the signal handler is executing; and c) if the handler interrupts (certain) blocking system calls, then the system call is not automatically restarted. RETURN VALUE
The sysv_signal() function returns the previous value of the signal handler, or SIG_ERR on error. ERRORS
As for signal(2). CONFORMING TO
This function is nonstandard. NOTES
Use of sysv_signal() should be avoided; use sigaction(2) instead. On older Linux systems, sysv_signal() and signal(2) were equivalent. But on newer systems, signal(2) provides reliable signal semantics; see signal(2) for details. The use of sighandler_t is a GNU extension; this type is only defined if the _GNU_SOURCE feature test macro is defined. SEE ALSO
sigaction(2), signal(2), bsd_signal(3), feature_test_macros(7), signal(7) COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. 2007-05-04 SYSV_SIGNAL(3)

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