diff options
Diffstat (limited to 'Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c')
-rw-r--r-- | Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c b/Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c new file mode 100644 index 0000000000..c61a550119 --- /dev/null +++ b/Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c @@ -0,0 +1,43 @@ +/** @file
+ InterLockedIncrement function
+
+ Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php.
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+
+
+
+/**
+ Performs an atomic increment of an 32-bit unsigned integer.
+
+ Performs an atomic increment of the 32-bit unsigned integer specified by
+ Value and returns the incremented value. The increment operation must be
+ performed using MP safe mechanisms. The state of the return value is not
+ guaranteed to be MP safe.
+
+ @param Value A pointer to the 32-bit value to increment.
+
+ @return The incremented value.
+
+**/
+UINT32
+EFIAPI
+InternalSyncIncrement (
+ IN volatile UINT32 *Value
+ )
+{
+ _asm {
+ mov eax, Value
+ lock inc dword ptr [eax]
+ mov eax, [eax]
+ }
+}
+
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