[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / InterlockedIncrement.c

/** @file\r
  InterLockedIncrement function\r
\r
  Copyright (c) 2006 - 2007, Intel Corporation<BR>\r
  All rights reserved. This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
\r
\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      UINT32                    *Value\r
  )\r
{\r
  _asm {\r
    mov     eax, Value\r
    lock    inc     dword ptr [eax]\r
    mov     eax, [eax]\r
  }\r
}\r
\r
Commit	Line	Data
e1f414b6	1	/** @file\r
	2	InterLockedIncrement function\r
	3	\r
	4	Copyright (c) 2006 - 2007, Intel Corporation<BR>\r
	5	All rights reserved. This program and the accompanying materials\r
	6	are licensed and made available under the terms and conditions of the BSD License\r
	7	which accompanies this distribution. The full text of the license may be found at\r
	8	http://opensource.org/licenses/bsd-license.php\r
	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
	13	**/\r
	14	\r
1efcc4ae	15	\r
f734a10a	16	\r
e1f414b6	17	\r
42eedea9	18	/**\r
	19	Performs an atomic increment of an 32-bit unsigned integer.\r
	20	\r
	21	Performs an atomic increment of the 32-bit unsigned integer specified by\r
	22	Value and returns the incremented value. The increment operation must be\r
	23	performed using MP safe mechanisms. The state of the return value is not\r
	24	guaranteed to be MP safe.\r
	25	\r
	26	@param Value A pointer to the 32-bit value to increment.\r
	27	\r
	28	@return The incremented value.\r
	29	\r
	30	**/\r
e1f414b6	31	UINT32\r
	32	EFIAPI\r
	33	InternalSyncIncrement (\r
	34	IN UINT32 *Value\r
	35	)\r
	36	{\r
	37	_asm {\r
	38	mov eax, Value\r
	39	lock inc dword ptr [eax]\r
	40	mov eax, [eax]\r
	41	}\r
	42	}\r
	43	\r