Removed Cygwin platform.

[pdclib] / platform / example_cygwin / includes / signal.h

diff --git a/platform/example_cygwin/includes/signal.h b/platform/example_cygwin/includes/signal.h
deleted file mode 100644 (file)
index 5d57fca..0000000
--- a/platform/example_cygwin/includes/signal.h
+++ /dev/null
@@ -1,85 +0,0 @@
-/* Signal handling <string.h>
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#ifndef _PDCLIB_SIGNAL_H
-#define _PDCLIB_SIGNAL_H _PDCLIB_SIGNAL_H
-
-#include <_PDCLIB_config.h>
-
-/* Signals ------------------------------------------------------------------ */
-
-/* A word on signals, to the people using PDCLib in their OS projects.
-
-   The definitions of the C standard leave about everything that *could* be
-   useful to be "implementation defined". Without additional, non-standard
-   arrangements, it is not possible to turn them into a useful tool.
-
-   This example implementation chose to "not generate any of these signals,
-   except as a result of explicit calls to the raise function", which is
-   allowed by the standard but of course does nothing for the usefulness of
-   <signal.h>.
-
-   A useful signal handling would:
-   1) make signal() a system call that registers the signal handler with the OS
-   2) make raise() a system call triggering an OS signal to the running process
-   3) make provisions that further signals of the same type are blocked until
-      the signal handler returns (optional for SIGILL)
-*/
-
-/* These are the values used by Linux. */
-
-/* Abnormal termination / abort() */
-#define SIGABRT 6
-/* Arithmetic exception / division by zero / overflow */
-#define SIGFPE  8
-/* Illegal instruction */
-#define SIGILL  4
-/* Interactive attention signal */
-#define SIGINT  2
-/* Invalid memory access */
-#define SIGSEGV 11
-/* Termination request */
-#define SIGTERM 15
-
-/* The following should be defined to pointer values that could NEVER point to
-   a valid signal handler function. (They are used as special arguments to
-   signal().) Again, these are the values used by Linux.
-*/
-#define SIG_DFL (void (*)( int ))0
-#define SIG_ERR (void (*)( int ))-1
-#define SIG_IGN (void (*)( int ))1
-
-typedef _PDCLIB_sig_atomic sig_atomic_t;
-
-/* Installs a signal handler "func" for the given signal.
-   A signal handler is a function that takes an integer as argument (the signal
-   number) and returns void.
-
-   Note that a signal handler can do very little else than:
-   1) assign a value to a static object of type "volatile sig_atomic_t",
-   2) call signal() with the value of sig equal to the signal received,
-   3) call _Exit(),
-   4) call abort().
-   Virtually everything else is undefind.
-
-   The signal() function returns the previous installed signal handler, which
-   at program start may be SIG_DFL or SIG_ILL. (This implementation uses
-   SIG_DFL for all handlers.) If the request cannot be honored, SIG_ERR is
-   returned and errno is set to an unspecified positive value.
-*/
-void (*signal( int sig, void (*func)( int ) ) )( int );
-
-/* Raises the given signal (executing the registered signal handler with the
-   given signal number as parameter).
-   This implementation does not prevent further signals of the same time from
-   occuring, but executes signal( sig, SIG_DFL ) before entering the signal
-   handler (i.e., a second signal before the signal handler re-registers itself
-   or SIG_IGN will end the program).
-   Returns zero if successful, nonzero otherwise. */
-int raise( int sig );
-
-#endif
-