From a332e112b73d641ca603066e46bb5b05d6c054fc Mon Sep 17 00:00:00 2001
From: bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Sat, 3 Sep 2005 17:55:47 +0000
Subject: kqemu_cpu_interrupt support for win32 (Filip Navara)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1566 c046a42c-6fe2-441c-8c8c-71466251a162
---
 exec-all.h |  1 +
 kqemu.c    | 22 +++++++++++++++++-----
 vl.c       |  3 +++
 3 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/exec-all.h b/exec-all.h
index 33780660f..045648c06 100644
--- a/exec-all.h
+++ b/exec-all.h
@@ -611,6 +611,7 @@ int kqemu_cpu_exec(CPUState *env);
 void kqemu_flush_page(CPUState *env, target_ulong addr);
 void kqemu_flush(CPUState *env, int global);
 void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr);
+void kqemu_cpu_interrupt(CPUState *env);
 
 static inline int kqemu_is_ok(CPUState *env)
 {
diff --git a/kqemu.c b/kqemu.c
index 94792c09f..70cfe2879 100644
--- a/kqemu.c
+++ b/kqemu.c
@@ -596,11 +596,14 @@ int kqemu_cpu_exec(CPUState *env)
     }
 
 #ifdef _WIN32
-    DeviceIoControl(kqemu_fd, KQEMU_EXEC,
-		    kenv, sizeof(struct kqemu_cpu_state),
-		    kenv, sizeof(struct kqemu_cpu_state),
-		    &temp, NULL);
-    ret = kenv->retval;
+    if (DeviceIoControl(kqemu_fd, KQEMU_EXEC,
+                        kenv, sizeof(struct kqemu_cpu_state),
+                        kenv, sizeof(struct kqemu_cpu_state),
+                        &temp, NULL)) {
+        ret = kenv->retval;
+    } else {
+        ret = -1;
+    }
 #else
 #if KQEMU_VERSION >= 0x010100
     ioctl(kqemu_fd, KQEMU_EXEC, kenv);
@@ -737,4 +740,13 @@ int kqemu_cpu_exec(CPUState *env)
     return 0;
 }
 
+void kqemu_cpu_interrupt(CPUState *env)
+{
+#if defined(_WIN32) && KQEMU_VERSION >= 0x010101
+    /* cancelling the I/O request causes KQEMU to finish executing the 
+       current block and successfully returning. */
+    CancelIo(kqemu_fd);
+#endif
+}
+
 #endif
diff --git a/vl.c b/vl.c
index 9819916a1..ea46bdc9c 100644
--- a/vl.c
+++ b/vl.c
@@ -875,6 +875,9 @@ static void host_alarm_handler(int host_signum)
                            qemu_get_clock(rt_clock))) {
         /* stop the cpu because a timer occured */
         cpu_interrupt(global_env, CPU_INTERRUPT_EXIT);
+#ifdef USE_KQEMU
+        kqemu_cpu_interrupt(global_env);
+#endif
     }
 }
 
-- 
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