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lockable: fix __COUNTER__ macro to be referenced properly

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- __COUNTER__ doesn't work with ## concat
- replaced ## with glue() macro so __COUNTER__ is evaluated

Fixes: 3284c3ddc4

Signed-off-by: Daniel Brodsky <dnbrdsky@gmail.com>
Message-id: 20200404042108.389635-2-dnbrdsky@gmail.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Daniel Brodsky 2020-04-03 21:21:07 -07:00 committed by Stefan Hajnoczi
parent 05509c8e6d
commit 56f21718b8
2 changed files with 5 additions and 4 deletions
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7
include/qemu/lockable.h
View file

@ -152,7 +152,7 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC(QemuLockable, qemu_lockable_auto_unlock)
* }
*/
#define WITH_QEMU_LOCK_GUARD(x) \
WITH_QEMU_LOCK_GUARD_((x), qemu_lockable_auto##__COUNTER__)
WITH_QEMU_LOCK_GUARD_((x), glue(qemu_lockable_auto, __COUNTER__))
/**
* QEMU_LOCK_GUARD - Lock an object until the end of the scope
@ -169,8 +169,9 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC(QemuLockable, qemu_lockable_auto_unlock)
* return; <-- mutex is automatically unlocked
* }
*/
#define QEMU_LOCK_GUARD(x) \
g_autoptr(QemuLockable) qemu_lockable_auto##__COUNTER__ = \
#define QEMU_LOCK_GUARD(x) \
g_autoptr(QemuLockable) \
glue(qemu_lockable_auto, __COUNTER__) G_GNUC_UNUSED = \
qemu_lockable_auto_lock(QEMU_MAKE_LOCKABLE((x)))
#endif

2
include/qemu/rcu.h
View file

@ -170,7 +170,7 @@ static inline void rcu_read_auto_unlock(RCUReadAuto *r)
G_DEFINE_AUTOPTR_CLEANUP_FUNC(RCUReadAuto, rcu_read_auto_unlock)
#define WITH_RCU_READ_LOCK_GUARD() \
WITH_RCU_READ_LOCK_GUARD_(_rcu_read_auto##__COUNTER__)
WITH_RCU_READ_LOCK_GUARD_(glue(_rcu_read_auto, __COUNTER__))
#define WITH_RCU_READ_LOCK_GUARD_(var) \
for (g_autoptr(RCUReadAuto) var = rcu_read_auto_lock(); \