1 files changed, 76 insertions, 0 deletions
diff --git a/agent/tcf/services/symbols_alloc.h b/agent/tcf/services/symbols_alloc.h
new file mode 100644
index 00000000..abc710f1
--- /dev/null
+++ b/agent/tcf/services/symbols_alloc.h
@@ -0,0 +1,76 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Wind River Systems, Inc. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * and Eclipse Distribution License v1.0 which accompany this distribution.
+ * The Eclipse Public License is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ * and the Eclipse Distribution License is available at
+ * http://www.eclipse.org/org/documents/edl-v10.php.
+ * You may elect to redistribute this code under either of these licenses.
+ *
+ * Contributors:
+ *     Wind River Systems - initial API and implementation
+ *******************************************************************************/
+
+/*
+ * Symbols service - symbol memory management code.
+ */
+
+#define SYMBOL_MAGIC 0x34875234
+#define SYMBOL_BLOCK_SIZE 64
+
+typedef struct SymbolBlock {
+    struct SymbolBlock * next;
+    Symbol syms[SYMBOL_BLOCK_SIZE];
+    int busy_cnt;
+} SymbolBlock;
+
+static SymbolBlock * syms_free = NULL;
+static SymbolBlock * syms_busy = NULL;
+static int syms_event_posted = 0;
+static int syms_cnt = 0;
+
+static void syms_event(void * arg) {
+    syms_event_posted = 0;
+    if (syms_cnt > 8 && syms_free != NULL) {
+        SymbolBlock * s = syms_free;
+        syms_free = s->next;
+        loc_free(s);
+        syms_cnt--;
+    }
+    while (syms_busy != NULL) {
+        SymbolBlock * s = syms_busy;
+        syms_busy = s->next;
+        memset(s, 0, sizeof(SymbolBlock));
+        s->next = syms_free;
+        syms_free = s;
+    }
+}
+
+static Symbol * alloc_symbol(void) {
+    Symbol * s = NULL;
+
+    if (syms_busy == NULL || syms_busy->busy_cnt >= SYMBOL_BLOCK_SIZE) {
+        SymbolBlock * b = syms_free;
+        if (b != NULL) {
+            syms_free = b->next;
+        }
+        else {
+            b = (SymbolBlock *)loc_alloc_zero(sizeof(SymbolBlock));
+            syms_cnt++;
+        }
+        b->next = syms_busy;
+        syms_busy = b;
+        assert(b->busy_cnt == 0);
+    }
+
+    s = syms_busy->syms + syms_busy->busy_cnt++;
+    assert(s->magic == 0);
+    s->magic = SYMBOL_MAGIC;
+    if (!syms_event_posted) {
+        post_event(syms_event, NULL);
+        syms_event_posted = 1;
+    }
+    return s;
+}