Clarify that FreePages(), FreeAlignedPages(), and FreePool() may perform n actions if those operations are not possible. For example, the PEI Phase does not provide any services to free allocated pages or allocated pool memory.

Update comments in PeiMemoryAllocationLib and UefiMemoryAllocationLib to match updates to MemoryAllocationLib.h.

Add ASSERT() statements in PeiMemoryAllocationLib for the FreePages() and FreeAlignedPages() if Pages is 0.


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8275 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 8 insertions, 3 deletions

diff --git a/MdePkg/Library/PeiMemoryAllocationLib/MemoryAllocationLib.c b/MdePkg/Library/PeiMemoryAllocationLib/MemoryAllocationLib.c
index f9e723ef2f..4e5f8fadd4 100644
--- a/MdePkg/Library/PeiMemoryAllocationLib/MemoryAllocationLib.c
+++ b/MdePkg/Library/PeiMemoryAllocationLib/MemoryAllocationLib.c
@@ -128,7 +128,8 @@ AllocateReservedPages (
 

   Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer.  Buffer

   must have been allocated on a previous call to the page allocation services of the Memory

-  Allocation Library.

+  Allocation Library.  If it is not possible to free allocated pages, then this function will

+  peform no actions.

   

   If Buffer was not allocated with a page allocation function in the Memory Allocation Library,

   then ASSERT().

@@ -145,6 +146,7 @@ FreePages (
   IN UINTN  Pages

   )

 {

+  ASSERT (Pages != 0);

   //

   // PEI phase does not support to free pages, so leave it as NOP.

   //

@@ -288,7 +290,8 @@ AllocateAlignedReservedPages (
 

   Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer.  Buffer

   must have been allocated on a previous call to the aligned page allocation services of the Memory

-  Allocation Library.

+  Allocation Library.  If it is not possible to free allocated pages, then this function will 

+  peform no actions.

   

   If Buffer was not allocated with an aligned page allocation function in the Memory Allocation

   Library, then ASSERT().

@@ -305,6 +308,7 @@ FreeAlignedPages (
   IN UINTN  Pages

   )

 {

+  ASSERT (Pages != 0);

   //

   // PEI phase does not support to free pages, so leave it as NOP.

   //

@@ -775,7 +779,8 @@ ReallocateReservedPool (
   Memory Allocation Library.

 

   Frees the buffer specified by Buffer.  Buffer must have been allocated on a previous call to the

-  pool allocation services of the Memory Allocation Library.

+  pool allocation services of the Memory Allocation Library.  If it is not possible to free pool

+  resources, then this function will peform no actions.

   

   If Buffer was not allocated with a pool allocation function in the Memory Allocation Library,

   then ASSERT().