From c1f295aa8666eb1c08a1edf944ac5617659a066c Mon Sep 17 00:00:00 2001
From: d <>
Date: Fri, 20 Nov 1998 11:18:51 +0000
Subject: Add thread-safety to libc, so that libc_r will build (on i386 at
 least). All POSIX libc api now there (to P1003.1c/D10)   (more md stuff is
 needed for other libc/arch/*)   (setlogin is no longer a special syscall) Add
 -pthread option to gcc (that makes it use -lc_r and -D_POSIX_THREADS). Doc
 some re-entrant routines Add libc_r to intro(3) dig() uses some libc srcs and
 an extra -I was needed there. Add more md stuff to libc_r. Update includes
 for the pthreads api Update libc_r TODO

---
 src/lib/libc/stdlib/malloc.c | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

(limited to 'src/lib/libc/stdlib/malloc.c')

diff --git a/src/lib/libc/stdlib/malloc.c b/src/lib/libc/stdlib/malloc.c
index d1d8759791..ecbf93dc48 100644
--- a/src/lib/libc/stdlib/malloc.c
+++ b/src/lib/libc/stdlib/malloc.c
@@ -8,7 +8,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: malloc.c,v 1.32 1998/08/06 16:26:32 millert Exp $";
+static char rcsid[] = "$OpenBSD: malloc.c,v 1.33 1998/11/20 11:18:50 d Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 /*
@@ -87,15 +87,27 @@ static char rcsid[] = "$OpenBSD: malloc.c,v 1.32 1998/08/06 16:26:32 millert Exp
 #endif /* __OpenBSD__ */
 
 #ifdef _THREAD_SAFE
-#include <pthread.h>
-static pthread_mutex_t malloc_lock;
-#define THREAD_LOCK()		pthread_mutex_lock(&malloc_lock)
-#define THREAD_UNLOCK()		pthread_mutex_unlock(&malloc_lock)
-#define THREAD_LOCK_INIT()	pthread_mutex_init(&malloc_lock, 0);
+# include "thread_private.h"
+# if 0
+   /* kernel threads */
+#  include <pthread.h>
+   static pthread_mutex_t malloc_lock;
+#  define THREAD_LOCK()		pthread_mutex_lock(&malloc_lock)
+#  define THREAD_UNLOCK()	pthread_mutex_unlock(&malloc_lock)
+#  define THREAD_LOCK_INIT()	pthread_mutex_init(&malloc_lock, 0);
+# else
+   /* user threads */
+#  include "spinlock.h"
+   static spinlock_t malloc_lock = _SPINLOCK_INITIALIZER;
+#  define THREAD_LOCK()		if (__isthreaded) _SPINLOCK(&malloc_lock)
+#  define THREAD_UNLOCK()	if (__isthreaded) _SPINUNLOCK(&malloc_lock)
+#  define THREAD_LOCK_INIT()	
+# endif
 #else
-#define THREAD_LOCK()
-#define THREAD_UNLOCK()
-#define THREAD_LOCK_INIT()
+  /* no threads */
+# define THREAD_LOCK()
+# define THREAD_UNLOCK()
+# define THREAD_LOCK_INIT()
 #endif
 
 /*
-- 
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