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[PATCH v6 1/3] stat64: Add stat64_set() operation
From: |
Juan Quintela |
Subject: |
[PATCH v6 1/3] stat64: Add stat64_set() operation |
Date: |
Thu, 27 Apr 2023 11:52:48 +0200 |
From: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
---
include/qemu/stats64.h | 6 ++++++
util/stats64.c | 11 +++++++++++
2 files changed, 17 insertions(+)
diff --git a/include/qemu/stats64.h b/include/qemu/stats64.h
index 802402254b..99b5cb724a 100644
--- a/include/qemu/stats64.h
+++ b/include/qemu/stats64.h
@@ -40,6 +40,11 @@ static inline uint64_t stat64_get(const Stat64 *s)
return qatomic_read__nocheck(&s->value);
}
+static inline void stat64_set(Stat64 *s, uint64_t value)
+{
+ qatomic_set__nocheck(&s->value, value);
+}
+
static inline void stat64_add(Stat64 *s, uint64_t value)
{
qatomic_add(&s->value, value);
@@ -62,6 +67,7 @@ static inline void stat64_max(Stat64 *s, uint64_t value)
}
#else
uint64_t stat64_get(const Stat64 *s);
+void stat64_set(Stat64 *s, uint64_t value);
bool stat64_min_slow(Stat64 *s, uint64_t value);
bool stat64_max_slow(Stat64 *s, uint64_t value);
bool stat64_add32_carry(Stat64 *s, uint32_t low, uint32_t high);
diff --git a/util/stats64.c b/util/stats64.c
index 897613c949..09736014ec 100644
--- a/util/stats64.c
+++ b/util/stats64.c
@@ -57,6 +57,17 @@ uint64_t stat64_get(const Stat64 *s)
return ((uint64_t)high << 32) | low;
}
+void stat64_set(Stat64 *s, uint64_t val)
+{
+ while (!stat64_wrtrylock(s)) {
+ cpu_relax();
+ }
+
+ qatomic_set(&s->high, val >> 32);
+ qatomic_set(&s->low, val);
+ stat64_wrunlock(s);
+}
+
bool stat64_add32_carry(Stat64 *s, uint32_t low, uint32_t high)
{
uint32_t old;
--
2.40.0