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Bug 391915: Don't use atoms from nsCacheMetaData because atoms aren't threadsafe. r+sr=biesi, a=blocking1.9

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This commit is contained in:
sharparrow1@yahoo.com 2007-08-30 10:51:07 -07:00
parent 27877b11ea
commit c284e81edc
2 changed files with 9 additions and 27 deletions
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32
netwerk/cache/src/nsCacheMetaData.cpp vendored
View File

@ -67,11 +67,9 @@ nsCacheMetaData::GetElement(const char * key)
// We assume the number of meta data elements will be very small, so
// we keep it real simple. Singly-linked list, linearly searched.
nsCOMPtr<nsIAtom> keyAtom = do_GetAtom(key);
MetaElement * elem = mData;
while (elem) {
if (elem->mKey == keyAtom)
if (elem->mKey.EqualsASCII(key))
return elem->mValue;
elem = elem->mNext;
}
@ -83,17 +81,13 @@ nsresult
nsCacheMetaData::SetElement(const char * key,
const char * value)
{
nsCOMPtr<nsIAtom> keyAtom = do_GetAtom(key);
if (!keyAtom)
return NS_ERROR_OUT_OF_MEMORY;
PRUint32 keySize = strlen(key);
PRUint32 valueSize = value ? strlen(value) : 0;
// find and remove or update old meta data element
MetaElement * elem = mData, * last = nsnull;
while (elem) {
if (elem->mKey == keyAtom) {
if (elem->mKey.Equals(key)) {
// Get length of old value
PRUint32 oldValueLen = strlen(elem->mValue);
if (valueSize == oldValueLen) {
@ -120,7 +114,7 @@ nsCacheMetaData::SetElement(const char * key,
elem = new (value, valueSize) MetaElement;
if (!elem)
return NS_ERROR_OUT_OF_MEMORY;
elem->mKey = keyAtom;
elem->mKey.Assign(key);
// insert after last or as first element...
if (last) {
@ -142,8 +136,6 @@ nsCacheMetaData::SetElement(const char * key,
nsresult
nsCacheMetaData::FlattenMetaData(char * buffer, PRUint32 bufSize)
{
const char *key;
if (mMetaSize > bufSize) {
NS_ERROR("buffer size too small for meta data.");
return NS_ERROR_OUT_OF_MEMORY;
@ -151,10 +143,8 @@ nsCacheMetaData::FlattenMetaData(char * buffer, PRUint32 bufSize)
MetaElement * elem = mData;
while (elem) {
elem->mKey->GetUTF8String(&key);
PRUint32 keySize = 1 + strlen(key);
memcpy(buffer, key, keySize);
PRUint32 keySize = 1 + elem->mKey.Length();
memcpy(buffer, elem->mKey.get(), keySize);
buffer += keySize;
PRUint32 valSize = 1 + strlen(elem->mValue);
@ -179,15 +169,11 @@ nsCacheMetaData::UnflattenMetaData(const char * data, PRUint32 size)
PRUint32 keySize = strlen(key);
data += 1 + keySize;
if (data < limit) {
nsCOMPtr<nsIAtom> keyAtom = do_GetAtom(key);
if (!keyAtom)
return NS_ERROR_OUT_OF_MEMORY;
PRUint32 valueSize = strlen(data);
MetaElement *elem = new (data, valueSize) MetaElement;
if (!elem)
return NS_ERROR_OUT_OF_MEMORY;
elem->mKey = keyAtom;
elem->mKey.Assign(key);
// insert after last or as first element...
if (last) {
@ -212,14 +198,10 @@ nsCacheMetaData::UnflattenMetaData(const char * data, PRUint32 size)
nsresult
nsCacheMetaData::VisitElements(nsICacheMetaDataVisitor * visitor)
{
const char *key;
MetaElement * elem = mData;
while (elem) {
elem->mKey->GetUTF8String(&key);
PRBool keepGoing;
nsresult rv = visitor->VisitMetaDataElement(key, elem->mValue, &keepGoing);
nsresult rv = visitor->VisitMetaDataElement(elem->mKey.get(), elem->mValue, &keepGoing);
if (NS_FAILED(rv) || !keepGoing)
break;

4
netwerk/cache/src/nsCacheMetaData.h vendored
View File

@ -44,7 +44,7 @@
#include "nspr.h"
#include "pldhash.h"
#include "nscore.h"
#include "nsIAtom.h"
#include "nsString.h"
class nsICacheMetaDataVisitor;
@ -74,7 +74,7 @@ private:
struct MetaElement
{
struct MetaElement * mNext;
nsCOMPtr<nsIAtom> mKey;
nsCString mKey;
char mValue[1]; // actually, bigger than 1
// MetaElement and mValue are allocated together via: