1 files changed, 99 insertions, 0 deletions
diff --git a/src/core/SkTLS.cpp b/src/core/SkTLS.cpp
new file mode 100755
index 0000000000..0cd79de9ff
--- /dev/null
+++ b/src/core/SkTLS.cpp
@@ -0,0 +1,99 @@
+#include "SkTLS.h"
+
+struct SkTLSRec {
+    SkTLSRec*           fNext;
+    void*               fData;
+    SkTLS::CreateProc   fCreateProc;
+    SkTLS::DeleteProc   fDeleteProc;
+
+    ~SkTLSRec() {
+        if (fDeleteProc) {
+            fDeleteProc(fData);
+        }
+        // else we leak fData, or it will be managed by the caller
+    }
+};
+
+void SkTLS::Destructor(void* ptr) {
+    SkTLSRec* rec = (SkTLSRec*)ptr;
+    do {
+        SkTLSRec* next = rec->fNext;
+        SkDELETE(rec);
+        rec = next;
+    } while (NULL != rec);
+}
+
+void* SkTLS::Get(CreateProc createProc, DeleteProc deleteProc) {
+    if (NULL == createProc) {
+        return NULL;
+    }
+
+    void* ptr = SkTLS::PlatformGetSpecific();
+
+    if (ptr) {
+        const SkTLSRec* rec = (const SkTLSRec*)ptr;
+        do {
+            if (rec->fCreateProc == createProc) {
+                SkASSERT(rec->fDeleteProc == deleteProc);
+                return rec->fData;
+            }
+        } while ((rec = rec->fNext) != NULL);
+        // not found, so create a new one
+    }
+    
+    // add a new head of our change
+    SkTLSRec* rec = new SkTLSRec;
+    rec->fNext = (SkTLSRec*)ptr;
+
+    SkTLS::PlatformSetSpecific(rec);
+
+    rec->fData = createProc();
+    rec->fCreateProc = createProc;
+    rec->fDeleteProc = deleteProc;
+    return rec->fData;
+}
+
+void* SkTLS::Find(CreateProc createProc) {
+    if (NULL == createProc) {
+        return NULL;
+    }
+    
+    void* ptr = SkTLS::PlatformGetSpecific();
+
+    if (ptr) {
+        const SkTLSRec* rec = (const SkTLSRec*)ptr;
+        do {
+            if (rec->fCreateProc == createProc) {
+                return rec->fData;
+            }
+        } while ((rec = rec->fNext) != NULL);
+    }
+    return NULL;
+}
+
+void SkTLS::Delete(CreateProc createProc) {
+    if (NULL == createProc) {
+        return;
+    }
+    
+    void* ptr = SkTLS::PlatformGetSpecific();
+    
+    SkTLSRec* curr = (SkTLSRec*)ptr;
+    SkTLSRec* prev = NULL;
+    while (curr) {
+        SkTLSRec* next = curr->fNext;
+        if (curr->fCreateProc == createProc) {
+            if (prev) {
+                prev->fNext = next;
+            } else {
+                // we have a new head of our chain
+                SkTLS::PlatformSetSpecific(next);
+            }
+            SkDELETE(curr);
+            break;
+        }
+        prev = curr;
+        curr = next;
+    }
+}
+