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Continue to reduce the size of the metadata cache by dynamically allocating the mutex.

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Swift SVN r23359
This commit is contained in:
Nadav Rotem
2014-11-16 23:08:52 +00:00
parent 3bb9279bcf
commit 3c23f144ab
1 changed files with 5 additions and 5 deletions
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10
stdlib/runtime/MetadataCache.h
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@@ -131,7 +131,7 @@ public:
/// be a valid state for the cache.
template <class Entry> class MetadataCache {
/// This pair ties an EntryRef Key and an Entry Value.
/// This pair ties an EntryRef Key and an Entry Value.
struct EntryPair {
EntryPair(EntryRef<Entry> K, Entry* V) : Key(K), Value(V) {}
EntryRef<Entry> Key;
@@ -145,7 +145,7 @@ template <class Entry> class MetadataCache {
MDMapTy *Map;
/// Synchronization of metadata creation.
std::mutex Lock;
std::mutex *Lock;
/// The head of a linked list connecting all the metadata cache entries.
/// TODO: Remove this when LLDB is able to understand the final data
@@ -153,8 +153,8 @@ template <class Entry> class MetadataCache {
const Entry *Head;
public:
MetadataCache() : Map(new MDMapTy()), Lock() {}
~MetadataCache() { delete Map; }
MetadataCache() : Map(new MDMapTy()), Lock(new std::mutex()) {}
~MetadataCache() { delete Map; delete Lock; }
/// Caches are not copyable.
MetadataCache(const MetadataCache &other) = delete;
@@ -191,7 +191,7 @@ public:
// We did not find a key so we will need to create one and store it.
{
std::unique_lock<std::mutex> ConstructionGuard(Lock);
std::unique_lock<std::mutex> ConstructionGuard(*Lock);
// Some other thread may have setup the value we are about to construct
// while we were asleep so do a search before constructing a new value.