1. added functions header for BaseUefiDecompressLi

[mirror_edk2.git] / MdePkg / Library / BaseLib / Synchronization.c

diff --git a/MdePkg/Library/BaseLib/Synchronization.c b/MdePkg/Library/BaseLib/Synchronization.c
index 0d51956d748f6dda9f46cd0ee43b083352c74e78..cf001ce4d155ebd66d832eef9ec520db6503faaa 100644 (file)
--- a/MdePkg/Library/BaseLib/Synchronization.c
+++ b/MdePkg/Library/BaseLib/Synchronization.c
@@ -17,18 +17,61 @@
 #define SPIN_LOCK_RELEASED          ((SPIN_LOCK)1)\r
 #define SPIN_LOCK_ACQUIRED          ((SPIN_LOCK)2)\r
 \r
+/**\r
+  Performs an atomic increment of an 32-bit unsigned integer.\r
+\r
+  Performs an atomic increment of the 32-bit unsigned integer specified by\r
+  Value and returns the incremented value. The increment operation must be\r
+  performed using MP safe mechanisms. The state of the return value is not\r
+  guaranteed to be MP safe.\r
+\r
+  @param  Value A pointer to the 32-bit value to increment.\r
+\r
+  @return The incremented value.\r
+\r
+**/\r
 UINT32\r
 EFIAPI\r
 InternalSyncIncrement (\r
   IN      volatile UINT32           *Value\r
   );\r
 \r
+/**\r
+  Performs an atomic decrement of an 32-bit unsigned integer.\r
+\r
+  Performs an atomic decrement of the 32-bit unsigned integer specified by\r
+  Value and returns the decrement value. The decrement operation must be\r
+  performed using MP safe mechanisms. The state of the return value is not\r
+  guaranteed to be MP safe.\r
+\r
+  @param  Value A pointer to the 32-bit value to decrement.\r
+\r
+  @return The decrement value.\r
+\r
+**/\r
 UINT32\r
 EFIAPI\r
 InternalSyncDecrement (\r
   IN      volatile UINT32           *Value\r
   );\r
 \r
+/**\r
+  Performs an atomic compare exchange operation on a 32-bit unsigned integer.\r
+\r
+  Performs an atomic compare exchange operation on the 32-bit unsigned integer\r
+  specified by Value.  If Value is equal to CompareValue, then Value is set to \r
+  ExchangeValue and CompareValue is returned.  If Value is not equal to CompareValue,\r
+  then Value is returned.  The compare exchange operation must be performed using \r
+  MP safe mechanisms.\r
+\r
+  @param  Value         A pointer to the 32-bit value for the compare exchange\r
+                        operation.\r
+  @param  CompareValue  32-bit value used in compare operation.\r
+  @param  ExchangeValue 32-bit value used in exchange operation.\r
+\r
+  @return The original *Value before exchange.\r
+\r
+**/\r
 UINT32\r
 EFIAPI\r
 InternalSyncCompareExchange32 (\r
@@ -37,6 +80,22 @@ InternalSyncCompareExchange32 (
   IN      UINT32                    ExchangeValue\r
   );\r
 \r
+/**\r
+  Performs an atomic compare exchange operation on a 64-bit unsigned integer.\r
+\r
+  Performs an atomic compare exchange operation on the 64-bit unsigned integer specified \r
+  by Value.  If Value is equal to CompareValue, then Value is set to ExchangeValue and \r
+  CompareValue is returned.  If Value is not equal to CompareValue, then Value is returned. \r
+  The compare exchange operation must be performed using MP safe mechanisms.\r
+\r
+  @param  Value         A pointer to the 64-bit value for the compare exchange\r
+                        operation.\r
+  @param  CompareValue  64-bit value used in compare operation.\r
+  @param  ExchangeValue 64-bit value used in exchange operation.\r
+\r
+  @return The original *Value before exchange.\r
+\r
+**/\r
 UINT64\r
 EFIAPI\r
 InternalSyncCompareExchange64 (\r
@@ -267,6 +326,14 @@ InterlockedDecrement (
 /**\r
   Performs an atomic compare exchange operation on a 32-bit unsigned integer.\r
 \r
+  Performs an atomic compare exchange operation on the 32-bit unsigned integer\r
+  specified by Value.  If Value is equal to CompareValue, then Value is set to \r
+  ExchangeValue and CompareValue is returned.  If Value is not equal to CompareValue,\r
+  then Value is returned.  The compare exchange operation must be performed using \r
+  MP safe mechanisms.\r
+\r
+  If Value is NULL, then ASSERT().\r
+\r
   @param  Value         A pointer to the 32-bit value for the compare exchange\r
                         operation.\r
   @param  CompareValue  32-bit value used in compare operation.\r
@@ -290,6 +357,13 @@ InterlockedCompareExchange32 (
 /**\r
   Performs an atomic compare exchange operation on a 64-bit unsigned integer.\r
 \r
+  Performs an atomic compare exchange operation on the 64-bit unsigned integer specified \r
+  by Value.  If Value is equal to CompareValue, then Value is set to ExchangeValue and \r
+  CompareValue is returned.  If Value is not equal to CompareValue, then Value is returned. \r
+  The compare exchange operation must be performed using MP safe mechanisms.\r
+\r
+  If Value is NULL, then ASSERT().\r
+\r
   @param  Value         A pointer to the 64-bit value for the compare exchange\r
                         operation.\r
   @param  CompareValue  64-bit value used in compare operation.\r