initial import of NetBSD tree

1 files changed, 58 insertions, 0 deletions

diff --git a/lib/libpthread/arch/i386/machdep.h b/lib/libpthread/arch/i386/machdep.h
new file mode 100644
index 00000000000..10521b02235
--- /dev/null
+++ b/lib/libpthread/arch/i386/machdep.h
@@ -0,0 +1,58 @@
+/* ==== machdep.h ============================================================
+ * Copyright (c) 1993 by Chris Provenzano, proven@mit.edu
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *  This product includes software developed by Chris Provenzano.
+ * 4. The name of Chris Provenzano may not be used to endorse or promote 
+ *	  products derived from this software without specific prior written
+ *	  permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL CHRIS PROVENZANO BE LIABLE FOR ANY 
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE.
+ *
+ */
+
+
+/*
+ * The first machine dependent functions are the SEMAPHORES
+ * needing the test and set instruction.
+ */
+#define SEMAPHORE_CLEAR 0
+#define SEMAPHORE_SET   1
+
+#define SEMAPHORE_TEST_AND_SET(lock)    \
+({										\
+volatile long temp = SEMAPHORE_SET;     \
+										\
+__asm__("xchgl %0,(%2)"                 \
+        :"=r" (temp)                    \
+        :"0" (temp),"r" (lock));        \
+temp;                                   \
+})
+
+#define SEMAPHORE_RESET(lock)           *lock = SEMAPHORE_CLEAR
+
+/*
+ * Minimum stack size
+ */
+#define PTHREAD_STACK_MIN	1024
+