From 44a56b7d9a229b18b9f9886888eb344ee3f1ff99 Mon Sep 17 00:00:00 2001
From: bje <bje>
Date: Fri, 24 Jul 1998 12:06:28 +0000
Subject: 1998-07-24  Ben Elliston  <bje@cygnus.com>

	* pthread.h (SIG_BLOCK): Define if not already defined.
	(SIG_UNBLOCK): Likewise.
	(SIG_SETMASK): Likewise.
	(pthread_attr_t): Add signal mask member.
	(pthread_sigmask): Add function prototype.

	* signal.c (pthread_sigmask): Implement.

	* create.c: #include <string.h> to get a prototype for memcpy().
	(pthread_create): New threads inherit their creator's signal
	mask.  Copy the signal mask to the new thread structure.
---
 ChangeLog | 16 ++++++++++++++++
 create.c  |  3 +++
 pthread.h | 26 +++++++++++++++++++++++++
 signal.c  | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 110 insertions(+)
 create mode 100644 signal.c

diff --git a/ChangeLog b/ChangeLog
index bd2acf9..a7109c8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+1998-07-24  Ben Elliston  <bje@cygnus.com>
+
+	* pthread.h (SIG_BLOCK): Define if not already defined.
+	(SIG_UNBLOCK): Likewise.
+	(SIG_SETMASK): Likewise.
+	(pthread_attr_t): Add signal mask member.
+	(pthread_sigmask): Add function prototype.
+
+	* signal.c (pthread_sigmask): Implement.
+
+	* create.c: #include <string.h> to get a prototype for memcpy().
+	(pthread_create): New threads inherit their creator's signal
+	mask.  Copy the signal mask to the new thread structure.
+
+	
+
 Fri Jul 24 16:33:17 1998  Ross Johnson  <rpj@swan.canberra.edu.au>
 
 	* fork.c (pthread_atfork): Add all the necessary push calls.
diff --git a/create.c b/create.c
index 45b1570..e8fd1c1 100644
--- a/create.c
+++ b/create.c
@@ -8,6 +8,8 @@
 
 #include <windows.h>
 #include <process.h>
+#include <string.h>
+
 #include "pthread.h"
 #include "implement.h"
 
@@ -84,6 +86,7 @@ pthread_create(pthread_t *thread,
 	  attr_copy->canceltype = attr->canceltype;
 	  attr_copy->detached = attr->detached;
 	  attr_copy->priority = attr->priority;
+	  memcpy(attr_copy.sigmask, attr.sigmask, sizeof(sigset_t)); 
 	}
 
       /* Start running, not suspended. */
diff --git a/pthread.h b/pthread.h
index 8f6fdc5..43b9594 100644
--- a/pthread.h
+++ b/pthread.h
@@ -22,6 +22,22 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 #ifndef _PTHREADS_H
 #define _PTHREADS_H
 
+#ifdef HAVE_SIGNAL_H
+#include <signal.h>
+#endif /* HAVE_SIGNAL_H */
+
+#ifndef SIG_BLOCK
+#define SIG_BLOCK 0
+#endif /* SIG_BLOCK */
+
+#ifndef SIG_UNBLOCK 
+#define SIG_BLOCK 1
+#endif /* SIG_UNBLOCK */
+
+#ifndef SIG_SETMASK
+#define SIG_SETMASK 2
+#endif /* SIG_SETMASK */
+
 #define PTHREAD_THREADS_MAX 128
 #define PTHREAD_STACK_MIN   65535
 
@@ -72,6 +88,10 @@ typedef struct {
   int canceltype;                    /* PTHREAD_CANCEL_ASYNCHRONOUS
 					PTHREAD_CANCEL_DEFERRED */
 
+#ifdef HAVE_SIGSET_T
+  sigset_t sigmask;
+#endif /* HAVE_SIGSET_T */
+
   int priority;
 
 } pthread_attr_t;
@@ -243,6 +263,12 @@ void *pthread_getspecific(pthread_key_t key);
 
 int pthread_key_delete(pthread_key_t key);
 
+/* Signal handling. */
+
+int pthread_sigmask(int how,
+		    const sigset_t *set,
+		    sigset_t *oset);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */
diff --git a/signal.c b/signal.c
new file mode 100644
index 0000000..e0a41ca
--- /dev/null
+++ b/signal.c
@@ -0,0 +1,65 @@
+/*
+ * signal.c
+ *
+ * Description:
+ * POSIX thread-aware signal functions.
+ */
+
+#include "pthread.h"
+
+int
+pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
+{
+  /* Validate the `how' argument.*/
+  if (set != NULL)
+    {
+      switch (how)
+	{
+	case SIG_BLOCK:
+	  break;
+	case SIG_UNBLOCK:
+	  break;
+	case SIG_SETMASK:
+	  break;
+	default:
+	  /* Invalid `how' argument. */
+	  return EINVAL;
+	}
+    }
+
+  /* Copy the old mask before modifying it. */
+  if (oset != NULL)
+    {
+      memcpy(oset, this->attr->sigmask, sizeof(sigset_t));
+    }
+
+  if (set != NULL)
+    {
+      int i;
+      unsigned long *src = set;
+      unsigned long *dest = this->attr->sigmask;
+
+      switch (how)
+	{
+	case SIG_BLOCK:
+	  for (i = 0; i < (sizeof(sigset_t) / sizeof(unsigned long)); i++)
+	    {
+	      /* OR the bit field longword-wise. */
+	      *src++ |= *dest++;
+	    }
+	  break;
+	case SIG_UNBLOCK:
+	  for (i = 0; i < (sizeof(sigset_t) / sizeof(unsigned long)); i++)
+	    {
+	      /* XOR the bitfield longword-wise. */
+	      *src++ ^= *dest++;
+	    }
+	case SIG_SET:
+	  /* Replace the whole sigmask. */
+	  memcpy(this->attr.sigmask, set, sizeof(sigset_t));
+	  break;
+	}
+    }
+
+  return 0;
+}
-- 
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