Wrap pthread_spin on POSIX, or QemuMutex on Windows.
AFAIK there are is no off-the-shelf spinlock implementation for
Windows, so we'll just use QemuMutex.
Signed-off-by: Emilio G. Cota <c...@braap.org>
---
include/qemu/spinlock-posix.h | 60 +++++++++++++++++++++++++++++++++++++++++++
include/qemu/spinlock-win32.h | 33 ++++++++++++++++++++++++
include/qemu/spinlock.h | 10 ++++++++
3 files changed, 103 insertions(+)
create mode 100644 include/qemu/spinlock-posix.h
create mode 100644 include/qemu/spinlock-win32.h
create mode 100644 include/qemu/spinlock.h
diff --git a/include/qemu/spinlock-posix.h b/include/qemu/spinlock-posix.h
new file mode 100644
index 0000000..51c2c08
--- /dev/null
+++ b/include/qemu/spinlock-posix.h
@@ -0,0 +1,60 @@
+#ifndef QEMU_SPINLOCK_POSIX_H
+#define QEMU_SPINLOCK_POSIX_H
+
+#include <qemu/thread.h>
+#include <qemu/osdep.h>
+
+typedef pthread_spinlock_t QemuSpinLock;
+
+static inline void qemu_spinlock_error_exit(int err, const char *msg)
+{
+ fprintf(stderr, "qemu: %s: %s\n", msg, strerror(err));
+ abort();
+}
+
+static inline void qemu_spinlock_init(QemuSpinLock *lock)
+{
+ int rc;
+
+ rc = pthread_spin_init(lock, PTHREAD_PROCESS_SHARED);
+ if (unlikely(rc)) {
+ qemu_spinlock_error_exit(rc, __func__);
+ }
+}
+
+static inline void qemu_spinlock_destroy(QemuSpinLock *lock)
+{
+ int rc;
+
+ rc = pthread_spin_destroy(lock);
+ if (unlikely(rc)) {
+ qemu_spinlock_error_exit(rc, __func__);
+ }
+}
+
+static inline void qemu_spinlock_lock(QemuSpinLock *lock)
+{
+ int rc;
+
+ rc = pthread_spin_lock(lock);
+ if (unlikely(rc)) {
+ qemu_spinlock_error_exit(rc, __func__);
+ }
+}
+
+static inline int qemu_spinlock_trylock(QemuSpinLock *lock)
+{
+ return pthread_spin_trylock(lock);
+}
+
+static inline void qemu_spinlock_unlock(QemuSpinLock *lock)
+{
+ int rc;
+
+ rc = pthread_spin_unlock(lock);
+ if (unlikely(rc)) {
+ qemu_spinlock_error_exit(rc, __func__);
+ }
+}
+
+#endif /* QEMU_SPINLOCK_POSIX_H */
diff --git a/include/qemu/spinlock-win32.h b/include/qemu/spinlock-win32.h
new file mode 100644
index 0000000..5a105fb
--- /dev/null
+++ b/include/qemu/spinlock-win32.h
@@ -0,0 +1,33 @@
+#ifndef QEMU_SPINLOCK_WIN32_H
+#define QEMU_SPINLOCK_WIN32_H
+
+#include <qemu/thread.h>
+
+typedef QemuMutex QemuSpinLock;
+
+static inline void qemu_spinlock_init(QemuSpinLock *lock)
+{
+ qemu_mutex_init(lock);
+}
+
+static inline void qemu_spinlock_destroy(QemuSpinLock *lock)
+{
+ qemu_mutex_destroy(lock);
+}
+
+static inline void qemu_spinlock_lock(QemuSpinLock *lock)
+{
+ qemu_mutex_lock(lock);
+}
+
+static inline int qemu_spinlock_trylock(QemuSpinLock *lock)
+{
+ return qemu_mutex_trylock(lock);
+}
+
+static inline void qemu_spinlock_unlock(QemuSpinLock *lock)
+{
+ qemu_mutex_unlock(lock);
+}
+
+#endif /* QEMU_SPINLOCK_WIN32_H */
diff --git a/include/qemu/spinlock.h b/include/qemu/spinlock.h
new file mode 100644
index 0000000..001b55e
--- /dev/null
+++ b/include/qemu/spinlock.h
@@ -0,0 +1,10 @@
+#ifndef QEMU_SPINLOCK_H
+#define QEMU_SPINLOCK_H
+
+#ifdef _WIN32
+#include "spinlock-win32.h"
+#else
+#include "spinlock-posix.h"
+#endif
+
+#endif /* QEMU_SPINLOCK_H */
--
2.5.0
