jehanne: add setjmp.h

newlib/libc/sys/jehanne/include/setjmp.h

@@ -0,0 +1,58 @@
+/*
+ * This file is part of Jehanne.
+ *
+ * Copyright (C) 2017 Giacomo Tesio <giacomo@tesio.it>
+ *
+ * This is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * Jehanne is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _SETJMP_H_
+#ifdef __cplusplus
+extern "C" {
+#endif
+#define _SETJMP_H_
+
+typedef	uintptr_t jmp_buf[8];	/* we use newlib's x86_64 functions */
+
+#include <signal.h> /* for sigset_t and sigprocmask */
+
+typedef struct __sigjmpbuf
+{
+  jmp_buf __buf;
+  int __is_mask_saved;
+  sigset_t __saved_mask;
+} sigjmp_buf;
+
+extern void longjmp(jmp_buf env, int val) __attribute__ ((__noreturn__));
+extern int setjmp(jmp_buf env);
+extern void siglongjmp(sigjmp_buf env, int val) __attribute__ ((__noreturn__));
+extern int sigsetjmp(sigjmp_buf env, int savemask);
+
+extern void _longjmp (jmp_buf, int) __attribute__ ((__noreturn__));
+extern int _setjmp (jmp_buf);
+
+/* sigsetjmp is implemented as macro using setjmp */
+
+#define sigsetjmp(__jmpb, __savemask) \
+                 ( __jmpb.__is_mask_saved = __savemask && \
+                   (sigprocmask (SIG_BLOCK, NULL, &__jmpb.__saved_mask) == 0), \
+                    setjmp (__jmpb.__buf) )
+
+#define _longjmp(e, v) longjmp(e, v)
+#define _setjmp(e) setjmp(e)
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _SETJMP_H_ */
+