2 files changed, 189 insertions, 0 deletions
diff --git a/src/pdclib/platform/example/functions/signal/raise.c b/src/pdclib/platform/example/functions/signal/raise.c
new file mode 100644
index 0000000..59ccc9f
--- /dev/null
+++ b/src/pdclib/platform/example/functions/signal/raise.c
@@ -0,0 +1,114 @@
+/* raise( int )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <signal.h>
+
+#ifndef REGTEST
+
+#include <stdio.h>
+#include <stdlib.h>
+
+extern void (*_PDCLIB_sigabrt)( int );
+extern void (*_PDCLIB_sigfpe)( int );
+extern void (*_PDCLIB_sigill)( int );
+extern void (*_PDCLIB_sigint)( int );
+extern void (*_PDCLIB_sigsegv)( int );
+extern void (*_PDCLIB_sigterm)( int );
+
+int raise( int sig )
+{
+    void (*sighandler)( int );
+    const char * message;
+    switch ( sig )
+    {
+        case SIGABRT:
+            sighandler = _PDCLIB_sigabrt;
+            message = "Abnormal termination (SIGABRT)";
+            break;
+        case SIGFPE:
+            sighandler = _PDCLIB_sigfpe;
+            message = "Arithmetic exception (SIGFPE)";
+            break;
+        case SIGILL:
+            sighandler = _PDCLIB_sigill;
+            message = "Illegal instruction (SIGILL)";
+            break;
+        case SIGINT:
+            sighandler = _PDCLIB_sigint;
+            message = "Interactive attention signal (SIGINT)";
+            break;
+        case SIGSEGV:
+            sighandler = _PDCLIB_sigsegv;
+            message = "Invalid memory access (SIGSEGV)";
+            break;
+        case SIGTERM:
+            sighandler = _PDCLIB_sigterm;
+            message = "Termination request (SIGTERM)";
+            break;
+        default:
+            fprintf( stderr, "Unknown signal #%d\n", sig );
+            _Exit( EXIT_FAILURE );
+    }
+    if ( sighandler == SIG_DFL )
+    {
+        fputs( message, stderr );
+        _Exit( EXIT_FAILURE );
+    }
+    else if ( sighandler != SIG_IGN )
+    {
+        sighandler = signal( sig, SIG_DFL );
+        sighandler( sig );
+    }
+    return 0;
+}
+
+#endif
+
+#ifdef TEST
+
+#include "_PDCLIB_test.h"
+
+#include <stdlib.h>
+
+static volatile sig_atomic_t flag = 0;
+
+static int expected_signal = 0;
+
+static void test_handler( int sig )
+{
+    TESTCASE( sig == expected_signal );
+    flag = 1;
+}
+
+int main( void )
+{
+    /* Could be other than SIG_DFL if you changed the implementation. */
+    TESTCASE( signal( SIGABRT, SIG_IGN ) == SIG_DFL );
+    /* Should be ignored. */
+    TESTCASE( raise( SIGABRT ) == 0 );
+    /* Installing test handler, old handler should be returned */
+    TESTCASE( signal( SIGABRT, test_handler ) == SIG_IGN );
+    /* Raising and checking SIGABRT */
+    expected_signal = SIGABRT;
+    TESTCASE( raise( SIGABRT ) == 0 );
+    TESTCASE( flag == 1 );
+    /* Re-installing test handler, should have been reset to default */
+    /* Could be other than SIG_DFL if you changed the implementation. */
+    TESTCASE( signal( SIGABRT, test_handler ) == SIG_DFL );
+    /* Raising and checking SIGABRT */
+    flag = 0;
+    TESTCASE( raise( SIGABRT ) == 0 );
+    TESTCASE( flag == 1 );
+    /* Installing test handler for different signal... */
+    TESTCASE( signal( SIGTERM, test_handler ) == SIG_DFL );
+    /* Raising and checking SIGTERM */
+    expected_signal = SIGTERM;
+    TESTCASE( raise( SIGTERM ) == 0 );
+    TESTCASE( flag == 1 );
+    return TEST_RESULTS;
+}
+
+#endif
diff --git a/src/pdclib/platform/example/functions/signal/signal.c b/src/pdclib/platform/example/functions/signal/signal.c
new file mode 100644
index 0000000..e6775e7
--- /dev/null
+++ b/src/pdclib/platform/example/functions/signal/signal.c
@@ -0,0 +1,75 @@
+/* signal( int, void (*)( int ) )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <signal.h>
+
+#ifndef REGTEST
+
+#include <stdlib.h>
+
+void (*_PDCLIB_sigabrt)( int ) = SIG_DFL;
+void (*_PDCLIB_sigfpe)( int )  = SIG_DFL;
+void (*_PDCLIB_sigill)( int )  = SIG_DFL;
+void (*_PDCLIB_sigint)( int )  = SIG_DFL;
+void (*_PDCLIB_sigsegv)( int ) = SIG_DFL;
+void (*_PDCLIB_sigterm)( int ) = SIG_DFL;
+
+void (*signal( int sig, void (*func)( int ) ) )( int )
+{
+    void (*oldhandler)( int );
+    if ( sig <= 0 || func == SIG_ERR )
+    {
+        return SIG_ERR;
+    }
+    switch ( sig )
+    {
+        case SIGABRT:
+            oldhandler = _PDCLIB_sigabrt;
+            _PDCLIB_sigabrt = func;
+            break;
+        case SIGFPE:
+            oldhandler = _PDCLIB_sigfpe;
+            _PDCLIB_sigfpe = func;
+            break;
+        case SIGILL:
+            oldhandler = _PDCLIB_sigill;
+            _PDCLIB_sigill = func;
+            break;
+        case SIGINT:
+            oldhandler = _PDCLIB_sigint;
+            _PDCLIB_sigint = func;
+            break;
+        case SIGSEGV:
+            oldhandler = _PDCLIB_sigsegv;
+            _PDCLIB_sigsegv = func;
+            break;
+        case SIGTERM:
+            oldhandler = _PDCLIB_sigterm;
+            _PDCLIB_sigterm = func;
+            break;
+        default:
+            /* The standard calls for an unspecified "positive value". You
+               will probably want to define a specific value for this.
+            */
+            _PDCLIB_errno = 1;
+            return SIG_ERR;
+    }
+    return oldhandler;
+}
+
+#endif
+
+#ifdef TEST
+
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+    /* Testing covered by raise.c */
+    return TEST_RESULTS;
+}
+
+#endif