qemu/atomic.h: rename atomic_ to qatomic_

clang's C11 atomic_fetch_*() functions only take a C11 atomic type
pointer argument. QEMU uses direct types (int, etc) and this causes a
compiler error when a QEMU code calls these functions in a source file
that also included <stdatomic.h> via a system header file:

  $ CC=clang CXX=clang++ ./configure ... && make
  ../util/async.c:79:17: error: address argument to atomic operation must be a pointer to _Atomic type ('unsigned int *' invalid)

Avoid using atomic_*() names in QEMU's atomic.h since that namespace is
used by <stdatomic.h>. Prefix QEMU's APIs with 'q' so that atomic.h
and <stdatomic.h> can co-exist. I checked /usr/include on my machine and
searched GitHub for existing "qatomic_" users but there seem to be none.

This patch was generated using:

  $ git grep -h -o '\<atomic\(64\)\?_[a-z0-9_]\+' include/qemu/atomic.h | \
    sort -u >/tmp/changed_identifiers
  $ for identifier in $(</tmp/changed_identifiers); do
        sed -i "s%\<$identifier\>%q$identifier%g" \
            $(git grep -I -l "\<$identifier\>")
    done

I manually fixed line-wrap issues and misaligned rST tables.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200923105646.47864-1-stefanha@redhat.com>

1 files changed, 14 insertions, 14 deletions

diff --git a/include/qemu/stats64.h b/include/qemu/stats64.h
index 19a5ac4c56..fdd3d1b8f9 100644
--- a/include/qemu/stats64.h
+++ b/include/qemu/stats64.h
@@ -37,27 +37,27 @@ static inline void stat64_init(Stat64 *s, uint64_t value)
 
 static inline uint64_t stat64_get(const Stat64 *s)
 {
-    return atomic_read__nocheck(&s->value);
+    return qatomic_read__nocheck(&s->value);
 }
 
 static inline void stat64_add(Stat64 *s, uint64_t value)
 {
-    atomic_add(&s->value, value);
+    qatomic_add(&s->value, value);
 }
 
 static inline void stat64_min(Stat64 *s, uint64_t value)
 {
-    uint64_t orig = atomic_read__nocheck(&s->value);
+    uint64_t orig = qatomic_read__nocheck(&s->value);
     while (orig > value) {
-        orig = atomic_cmpxchg__nocheck(&s->value, orig, value);
+        orig = qatomic_cmpxchg__nocheck(&s->value, orig, value);
     }
 }
 
 static inline void stat64_max(Stat64 *s, uint64_t value)
 {
-    uint64_t orig = atomic_read__nocheck(&s->value);
+    uint64_t orig = qatomic_read__nocheck(&s->value);
     while (orig < value) {
-        orig = atomic_cmpxchg__nocheck(&s->value, orig, value);
+        orig = qatomic_cmpxchg__nocheck(&s->value, orig, value);
     }
 }
 #else
@@ -79,7 +79,7 @@ static inline void stat64_add(Stat64 *s, uint64_t value)
     low = (uint32_t) value;
     if (!low) {
         if (high) {
-            atomic_add(&s->high, high);
+            qatomic_add(&s->high, high);
         }
         return;
     }
@@ -101,7 +101,7 @@ static inline void stat64_add(Stat64 *s, uint64_t value)
          * the high 32 bits, so it can race just fine with stat64_add32_carry
          * and even stat64_get!
          */
-        old = atomic_cmpxchg(&s->low, orig, result);
+        old = qatomic_cmpxchg(&s->low, orig, result);
         if (orig == old) {
             return;
         }
@@ -116,7 +116,7 @@ static inline void stat64_min(Stat64 *s, uint64_t value)
     high = value >> 32;
     low = (uint32_t) value;
     do {
-        orig_high = atomic_read(&s->high);
+        orig_high = qatomic_read(&s->high);
         if (orig_high < high) {
             return;
         }
@@ -128,7 +128,7 @@ static inline void stat64_min(Stat64 *s, uint64_t value)
              * the write barrier in stat64_min_slow.
              */
             smp_rmb();
-            orig_low = atomic_read(&s->low);
+            orig_low = qatomic_read(&s->low);
             if (orig_low <= low) {
                 return;
             }
@@ -138,7 +138,7 @@ static inline void stat64_min(Stat64 *s, uint64_t value)
              * we may miss being lucky.
              */
             smp_rmb();
-            orig_high = atomic_read(&s->high);
+            orig_high = qatomic_read(&s->high);
             if (orig_high < high) {
                 return;
             }
@@ -156,7 +156,7 @@ static inline void stat64_max(Stat64 *s, uint64_t value)
     high = value >> 32;
     low = (uint32_t) value;
     do {
-        orig_high = atomic_read(&s->high);
+        orig_high = qatomic_read(&s->high);
         if (orig_high > high) {
             return;
         }
@@ -168,7 +168,7 @@ static inline void stat64_max(Stat64 *s, uint64_t value)
              * the write barrier in stat64_max_slow.
              */
             smp_rmb();
-            orig_low = atomic_read(&s->low);
+            orig_low = qatomic_read(&s->low);
             if (orig_low >= low) {
                 return;
             }
@@ -178,7 +178,7 @@ static inline void stat64_max(Stat64 *s, uint64_t value)
              * we may miss being lucky.
              */
             smp_rmb();
-            orig_high = atomic_read(&s->high);
+            orig_high = qatomic_read(&s->high);
             if (orig_high > high) {
                 return;
             }