Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 41 insertions, 0 deletions

diff --git a/kdecore/malloc/x86.h b/kdecore/malloc/x86.h
new file mode 100644
index 000000000..b21517374
--- /dev/null
+++ b/kdecore/malloc/x86.h
@@ -0,0 +1,41 @@
+#include <sched.h>
+#include <time.h>
+
+typedef struct {
+  volatile unsigned int lock;
+  int pad0_;
+} mutex_t;
+
+#define MUTEX_INITIALIZER          { 0, 0 }
+
+static __inline__ int lock(mutex_t *m) {
+  int cnt = 0, r;
+  struct timespec tm;
+
+  for(;;) {
+    __asm__ __volatile__
+      ("xchgl %0, %1"
+       : "=r"(r), "=m"(m->lock)
+       : "0"(1), "m"(m->lock)
+       : "memory");
+    if(!r)
+      return 0;
+#ifdef _POSIX_PRIORITY_SCHEDULING
+    if(cnt < 50) {
+      sched_yield();
+      cnt++;
+    } else
+#endif
+        {
+      tm.tv_sec = 0;
+      tm.tv_nsec = 2000001;
+      nanosleep(&tm, NULL);
+      cnt = 0;
+    }
+  }
+}
+
+static __inline__ int unlock(mutex_t *m) {
+  __asm __volatile ("movl $0,%0" : "=m" (m->lock));
+  return 0;
+}