From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51879) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1anJa1-0001eF-6o for qemu-devel@nongnu.org; Tue, 05 Apr 2016 01:31:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1anJZy-0005TM-3n for qemu-devel@nongnu.org; Tue, 05 Apr 2016 01:31:09 -0400 Received: from out5-smtp.messagingengine.com ([66.111.4.29]:38031) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1anJZx-0005St-WA for qemu-devel@nongnu.org; Tue, 05 Apr 2016 01:31:06 -0400 Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id 18C7D20DA8 for ; Tue, 5 Apr 2016 01:31:05 -0400 (EDT) From: "Emilio G. Cota" Date: Tue, 5 Apr 2016 01:30:48 -0400 Message-Id: <1459834253-8291-6-git-send-email-cota@braap.org> In-Reply-To: <1459834253-8291-1-git-send-email-cota@braap.org> References: <1459834253-8291-1-git-send-email-cota@braap.org> Subject: [Qemu-devel] [PATCH 05/10] include: add spinlock wrapper List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: QEMU Developers , MTTCG Devel Cc: Peter Maydell , Peter Crosthwaite , Sergey Fedorov , Paolo Bonzini , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Richard Henderson 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 --- 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 +#include + +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 + +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