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-rwxr-xr-xgeneric/tclThreadAlloc.c102
1 files changed, 55 insertions, 47 deletions
diff --git a/generic/tclThreadAlloc.c b/generic/tclThreadAlloc.c
index c0bb338..2cde913 100755
--- a/generic/tclThreadAlloc.c
+++ b/generic/tclThreadAlloc.c
@@ -11,12 +11,12 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclThreadAlloc.c,v 1.21 2006/08/10 12:15:31 dkf Exp $
+ * RCS: @(#) $Id: tclThreadAlloc.c,v 1.22 2007/06/29 03:17:05 das Exp $
*/
#include "tclInt.h"
#if defined(TCL_THREADS) && defined(USE_THREAD_ALLOC)
-
+
/*
* If range checking is enabled, an additional byte will be allocated to store
* the magic number at the end of the requested memory.
@@ -40,12 +40,14 @@
#define NOBJHIGH 1200
/*
- * The following defines the number of buckets in the bucket cache and those
- * block sizes from (1<<4) to (1<<(3+NBUCKETS))
+ * Alignment for allocated memory.
*/
-#define NBUCKETS 11
-#define MAXALLOC 16284
+#if defined(__APPLE__)
+#define ALLOCALIGN 16
+#else
+#define ALLOCALIGN 8
+#endif
/*
* The following union stores accounting information for each block including
@@ -54,23 +56,36 @@
* is also maintained.
*/
-typedef struct Block {
- union {
- struct Block *next; /* Next in free list. */
- struct {
- unsigned char magic1; /* First magic number. */
- unsigned char bucket; /* Bucket block allocated from. */
- unsigned char unused; /* Padding. */
- unsigned char magic2; /* Second magic number. */
- } s;
- } u;
- size_t reqSize; /* Requested allocation size. */
+typedef union Block {
+ struct {
+ union {
+ union Block *next; /* Next in free list. */
+ struct {
+ unsigned char magic1; /* First magic number. */
+ unsigned char bucket; /* Bucket block allocated from. */
+ unsigned char unused; /* Padding. */
+ unsigned char magic2; /* Second magic number. */
+ } s;
+ } u;
+ size_t reqSize; /* Requested allocation size. */
+ } b;
+ unsigned char padding[ALLOCALIGN];
} Block;
-#define nextBlock u.next
-#define sourceBucket u.s.bucket
-#define magicNum1 u.s.magic1
-#define magicNum2 u.s.magic2
+#define nextBlock b.u.next
+#define sourceBucket b.u.s.bucket
+#define magicNum1 b.u.s.magic1
+#define magicNum2 b.u.s.magic2
#define MAGIC 0xEF
+#define blockReqSize b.reqSize
+
+/*
+ * The following defines the minimum and and maximum block sizes and the number
+ * of buckets in the bucket cache.
+ */
+
+#define MINALLOC ((sizeof(Block) + 8 + (ALLOCALIGN-1)) & ~(ALLOCALIGN-1))
+#define NBUCKETS (11 - (MINALLOC >> 5))
+#define MAXALLOC (MINALLOC << (NBUCKETS - 1))
/*
* The following structure defines a bucket of blocks with various accounting
@@ -114,19 +129,7 @@ static struct {
int maxBlocks; /* Max blocks before move to share. */
int numMove; /* Num blocks to move to share. */
Tcl_Mutex *lockPtr; /* Share bucket lock. */
-} bucketInfo[NBUCKETS] = {
- { 16, 1024, 512, NULL},
- { 32, 512, 256, NULL},
- { 64, 256, 128, NULL},
- { 128, 128, 64, NULL},
- { 256, 64, 32, NULL},
- { 512, 32, 16, NULL},
- { 1024, 16, 8, NULL},
- { 2048, 8, 4, NULL},
- { 4096, 4, 2, NULL},
- { 8192, 2, 1, NULL},
- {16284, 1, 1, NULL},
-};
+} bucketInfo[NBUCKETS];
/*
* Static functions defined in this file.
@@ -178,7 +181,7 @@ GetCache(void)
if (listLockPtr == NULL) {
Tcl_Mutex *initLockPtr;
- int i;
+ unsigned int i;
initLockPtr = Tcl_GetAllocMutex();
Tcl_MutexLock(initLockPtr);
@@ -186,6 +189,10 @@ GetCache(void)
listLockPtr = TclpNewAllocMutex();
objLockPtr = TclpNewAllocMutex();
for (i = 0; i < NBUCKETS; ++i) {
+ bucketInfo[i].blockSize = MINALLOC << i;
+ bucketInfo[i].maxBlocks = 1 << (NBUCKETS - 1 - i);
+ bucketInfo[i].numMove = i < NBUCKETS - 1 ?
+ 1 << (NBUCKETS - 2 - i) : 1;
bucketInfo[i].lockPtr = TclpNewAllocMutex();
}
}
@@ -234,7 +241,7 @@ TclFreeAllocCache(
{
Cache *cachePtr = arg;
Cache **nextPtrPtr;
- register int bucket;
+ register unsigned int bucket;
/*
* Flush blocks.
@@ -379,12 +386,12 @@ TclpFree(
blockPtr = Ptr2Block(ptr);
bucket = blockPtr->sourceBucket;
if (bucket == NBUCKETS) {
- cachePtr->totalAssigned -= blockPtr->reqSize;
+ cachePtr->totalAssigned -= blockPtr->blockReqSize;
free(blockPtr);
return;
}
- cachePtr->buckets[bucket].totalAssigned -= blockPtr->reqSize;
+ cachePtr->buckets[bucket].totalAssigned -= blockPtr->blockReqSize;
blockPtr->nextBlock = cachePtr->buckets[bucket].firstPtr;
cachePtr->buckets[bucket].firstPtr = blockPtr;
++cachePtr->buckets[bucket].numFree;
@@ -450,12 +457,12 @@ TclpRealloc(
min = 0;
}
if (size > min && size <= bucketInfo[bucket].blockSize) {
- cachePtr->buckets[bucket].totalAssigned -= blockPtr->reqSize;
+ cachePtr->buckets[bucket].totalAssigned -= blockPtr->blockReqSize;
cachePtr->buckets[bucket].totalAssigned += reqSize;
return Block2Ptr(blockPtr, bucket, reqSize);
}
} else if (size > MAXALLOC) {
- cachePtr->totalAssigned -= blockPtr->reqSize;
+ cachePtr->totalAssigned -= blockPtr->blockReqSize;
cachePtr->totalAssigned += reqSize;
blockPtr = realloc(blockPtr, size);
if (blockPtr == NULL) {
@@ -470,8 +477,8 @@ TclpRealloc(
new = TclpAlloc(reqSize);
if (new != NULL) {
- if (reqSize > blockPtr->reqSize) {
- reqSize = blockPtr->reqSize;
+ if (reqSize > blockPtr->blockReqSize) {
+ reqSize = blockPtr->blockReqSize;
}
memcpy(new, ptr, reqSize);
TclpFree(ptr);
@@ -617,7 +624,7 @@ Tcl_GetMemoryInfo(
{
Cache *cachePtr;
char buf[200];
- int n;
+ unsigned int n;
Tcl_MutexLock(listLockPtr);
cachePtr = firstCachePtr;
@@ -719,7 +726,7 @@ Block2Ptr(
blockPtr->magicNum1 = blockPtr->magicNum2 = MAGIC;
blockPtr->sourceBucket = bucket;
- blockPtr->reqSize = reqSize;
+ blockPtr->blockReqSize = reqSize;
ptr = ((void *) (blockPtr + 1));
#if RCHECK
((unsigned char *)(ptr))[reqSize] = MAGIC;
@@ -739,10 +746,10 @@ Ptr2Block(
blockPtr, blockPtr->magicNum1, blockPtr->magicNum2);
}
#if RCHECK
- if (((unsigned char *) ptr)[blockPtr->reqSize] != MAGIC) {
+ if (((unsigned char *) ptr)[blockPtr->blockReqSize] != MAGIC) {
Tcl_Panic("alloc: invalid block: %p: %x %x %x",
blockPtr, blockPtr->magicNum1, blockPtr->magicNum2,
- ((unsigned char *) ptr)[blockPtr->reqSize]);
+ ((unsigned char *) ptr)[blockPtr->blockReqSize]);
}
#endif
return blockPtr;
@@ -973,7 +980,8 @@ GetBlocks(
void
TclFinalizeThreadAlloc(void)
{
- int i;
+ unsigned int i;
+
for (i = 0; i < NBUCKETS; ++i) {
TclpFreeAllocMutex(bucketInfo[i].lockPtr);
bucketInfo[i].lockPtr = NULL;
generated by cgit v0.12 at 2024-11-10 14:53:18 (GMT)