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(svn r19472) -Codechange: reorder the static members of ByteBlob and add Zero() (skidd13)

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This commit is contained in:
yexo 2010-03-19 20:13:15 +00:00
parent e70bfdf789
commit 787ccc692c
1 changed files with 44 additions and 37 deletions
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81
src/misc/blob.hpp
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@ -89,11 +89,52 @@ public:
} }
protected: protected:
/** initialize the empty blob by setting the header pointer to the static BlobHeader with /** all allocation should happen here */
* both items and capacity containing zero */ static FORCEINLINE BlobHeader *RawAlloc(uint num_bytes)
{
return (BlobHeader*)MallocT<byte>(num_bytes);
}
/** Return header pointer to the static BlobHeader with
* both items and capacity containing zero */
static FORCEINLINE BlobHeader *Zero()
{
return const_cast<BlobHeader *>(&ByteBlob::hdrEmpty[1]);
}
/** simple allocation policy - can be optimized later */
static FORCEINLINE uint AllocPolicy(uint min_alloc)
{
if (min_alloc < (1 << 9)) {
if (min_alloc < (1 << 5)) return (1 << 5);
return (min_alloc < (1 << 7)) ? (1 << 7) : (1 << 9);
}
if (min_alloc < (1 << 15)) {
if (min_alloc < (1 << 11)) return (1 << 11);
return (min_alloc < (1 << 13)) ? (1 << 13) : (1 << 15);
}
if (min_alloc < (1 << 20)) {
if (min_alloc < (1 << 17)) return (1 << 17);
return (min_alloc < (1 << 19)) ? (1 << 19) : (1 << 20);
}
min_alloc = (min_alloc | ((1 << 20) - 1)) + 1;
return min_alloc;
}
/** all deallocations should happen here */
static FORCEINLINE void RawFree(BlobHeader *p)
{
/* Just to silence an unsilencable GCC 4.4+ warning. */
assert(p != ByteBlob::hdrEmpty);
/* In case GCC warns about the following, see GCC's PR38509 why it is bogus. */
free(p);
}
/** initialize the empty blob */
FORCEINLINE void InitEmpty() FORCEINLINE void InitEmpty()
{ {
header = const_cast<BlobHeader *>(&ByteBlob::hdrEmpty[1]); header = Zero();
} }
/** initialize blob by attaching it to the given header followed by data */ /** initialize blob by attaching it to the given header followed by data */
@ -217,40 +258,6 @@ public:
RawFree(pOldHdr); RawFree(pOldHdr);
} }
/** simple allocation policy - can be optimized later */
FORCEINLINE static uint AllocPolicy(uint min_alloc)
{
if (min_alloc < (1 << 9)) {
if (min_alloc < (1 << 5)) return (1 << 5);
return (min_alloc < (1 << 7)) ? (1 << 7) : (1 << 9);
}
if (min_alloc < (1 << 15)) {
if (min_alloc < (1 << 11)) return (1 << 11);
return (min_alloc < (1 << 13)) ? (1 << 13) : (1 << 15);
}
if (min_alloc < (1 << 20)) {
if (min_alloc < (1 << 17)) return (1 << 17);
return (min_alloc < (1 << 19)) ? (1 << 19) : (1 << 20);
}
min_alloc = (min_alloc | ((1 << 20) - 1)) + 1;
return min_alloc;
}
/** all allocation should happen here */
static FORCEINLINE BlobHeader *RawAlloc(uint num_bytes)
{
return (BlobHeader*)MallocT<byte>(num_bytes);
}
/** all deallocations should happen here */
static FORCEINLINE void RawFree(BlobHeader *p)
{
/* Just to silence an unsilencable GCC 4.4+ warning. */
assert(p != ByteBlob::hdrEmpty);
/* In case GCC warns about the following, see GCC's PR38509 why it is bogus. */
free(p);
}
/** fixing the four bytes at the end of blob data - useful when blob is used to hold string */ /** fixing the four bytes at the end of blob data - useful when blob is used to hold string */
FORCEINLINE void FixTail() const FORCEINLINE void FixTail() const
{ {