From 66d68a58fbbeacfaa51f5210e9d6a549a677014f Mon Sep 17 00:00:00 2001
From: Stef Walter <stef@memberwebs.com>
Date: Wed, 9 Jun 2004 16:39:31 +0000
Subject: - Changed 'method' to 'handler' throughout - Fixed bug in hash.c with
 unitialized memory - Imported new hash table features - Writes out pid file
 when requested with -p option

---
 common/hash.c | 112 +++++++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 80 insertions(+), 32 deletions(-)

(limited to 'common/hash.c')

diff --git a/common/hash.c b/common/hash.c
index 6471803..9bbe8ac 100644
--- a/common/hash.c
+++ b/common/hash.c
@@ -89,38 +89,90 @@ struct hash_t
   unsigned int klen;
 #endif
 #ifdef HASH_CALLBACKS
-  hash_free_val_t f_free;
-  void* arg;
+  hash_table_calls_t calls;
 #endif
 };
 
 
 #define INITIAL_MAX 15 /* tunable == 2^n - 1 */
 
+#ifdef HASH_CALLBACKS
+
+/* A copy of the memory call table we've been set to */
+static hash_memory_calls_t g_memory_calls_cpy;
+
+/* Pointer to above. This indicates when we actually are set */
+static hash_memory_calls_t* g_memory_calls = NULL;
+
+static void* int_malloc(size_t len)
+{
+  if(g_memory_calls)
+    return (g_memory_calls->f_alloc)(g_memory_calls->arg, len);
+  else
+    return malloc(len);
+}
+
+static void* int_calloc(size_t len)
+{
+  void* p = int_malloc(len);
+  memset(p, 0, len);
+  return p;
+}
+
+static void int_free(void* ptr)
+{
+  if(g_memory_calls)
+  {
+    /* We allow for gc type memory allocation with a null free */
+    if(g_memory_calls->f_free)
+      (g_memory_calls->f_free)(g_memory_calls->arg, ptr);
+  }
+  else
+    free(ptr);
+}
+
+void hash_set_memory_calls(hash_memory_calls_t* hmc)
+{
+  if(hmc == NULL)
+  {
+    g_memory_calls = NULL;
+  }
+  else
+  {
+    memcpy(&g_memory_calls_cpy, hmc, sizeof(g_memory_calls_cpy));
+    g_memory_calls = &g_memory_calls_cpy;
+  }
+}
+
+void hash_set_table_calls(hash_t* ht, hash_table_calls_t* htc)
+{
+  memcpy(&(ht->calls), htc, sizeof(ht->calls));
+}
+
+#else
+
+#define int_malloc malloc
+#define int_free free
+
+#endif
+
+
 /*
  * Hash creation functions.
  */
 
 static hash_entry_t** alloc_array(hash_t* ht, unsigned int max)
 {
-  return malloc(sizeof(*(ht->array)) * (max + 1));
+  return int_malloc(sizeof(*(ht->array)) * (max + 1));
 }
 
-#ifdef HASH_CALLBACKS
-  #ifdef HASH_COPYKEYS
-hash_t* hash_create(size_t klen, hash_free_val_t f_free, void* arg)
-  #else
-hash_t* hash_create(hash_free_val_t f_free, void* arg)
-  #endif
-#else
-  #ifdef HASH_COPYKEYS
+#ifdef HASH_COPYKEYS
 hash_t* hash_create(size_t klen)
-  #else
+#else
 hash_t* hash_create()
-  #endif
 #endif
 {
-  hash_t* ht = malloc(sizeof(hash_t));
+  hash_t* ht = int_malloc(sizeof(hash_t));
   if(ht)
   {
     ht->count = 0;
@@ -128,14 +180,10 @@ hash_t* hash_create()
     ht->array = alloc_array(ht, ht->max);
 #ifdef HASH_COPYKEYS
     ht->klen = klen;
-#endif
-#ifdef HASH_CALLBACKS
-    ht->f_free = f_free;
-    ht->arg = arg;
 #endif
     if(!ht->array)
     {
-      free(ht);
+      int_free(ht);
       return NULL;
     }
   }
@@ -149,16 +197,16 @@ void hash_free(hash_t* ht)
   for(hi = hash_first(ht); hi; hi = hash_next(hi))
   {
 #ifdef HASH_CALLBACKS
-    if(hi->ths->val && ht->f_free)
-      ht->f_free(ht->arg, (void*)hi->ths->val);
+    if(hi->ths->val && ht->calls.f_freeval)
+      (ht->calls.f_freeval)(ht->calls.arg, (void*)hi->ths->val);
 #endif
-    free(hi->ths);
+    int_free(hi->ths);
   }
 
   if(ht->array)
-    free(ht->array);
+    int_free(ht->array);
 
-  free(ht);
+  int_free(ht);
 }
 
 /*
@@ -335,9 +383,9 @@ static hash_entry_t** find_entry(hash_t* ht, const void* key, size_t klen, const
 
   /* add a new entry for non-NULL val */
 #ifdef HASH_COPYKEYS
-  he = malloc(sizeof(*he) + klen);
+  he = int_malloc(sizeof(*he) + klen);
 #else
-  he = malloc(sizeof(*he));
+  he = int_malloc(sizeof(*he));
 #endif
 
   if(he)
@@ -395,8 +443,8 @@ int hash_set(hash_t* ht, const void* key, size_t klen, void* val)
   if(hep && *hep)
   {
 #ifdef HASH_CALLBACKS
-    if((*hep)->val && (*hep)->val != val && ht->f_free)
-      ht->f_free(ht->arg, (void*)((*hep)->val));
+    if((*hep)->val && (*hep)->val != val && ht->calls.f_freeval)
+      (ht->calls.f_freeval)(ht->calls.arg, (void*)((*hep)->val));
 #endif
 
     /* replace entry */
@@ -467,8 +515,8 @@ int hash_purge(hash_t* ht, time_t stamp)
 #endif
 
 #ifdef HASH_CALLBACKS
-      if(val && ht->f_free)
-        (ht->f_free)(ht->arg, val);
+      if(val && ht->calls.f_freeval)
+        (ht->calls.f_freeval)(ht->calls.arg, val);
 #endif
 
       r++;
@@ -523,8 +571,8 @@ int hash_bump(hash_t* ht)
 #endif
 
 #ifdef HASH_CALLBACKS
-    if(val && ht->f_free)
-      (ht->f_free)(ht->arg, (void*)val);
+    if(val && ht->calls.f_freeval)
+      (ht->calls.f_freeval)(ht->calls.arg, (void*)val);
 #endif
 
     return 1;
-- 
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