[libvirt] [PATCH RFC 01/40] util: hash: Add possibility to use simpler data free function in virHash

[Peter Krempa]

Introduce a new type virHashDataFreeSimple which has only a void * as
argument for cases when knowing the name of the entry when freeing the
hash entry is not required.

Signed-off-by: Peter Krempa <pkrempa at redhat.com>
---
 src/conf/domain_addr.c |  4 ++--
 src/util/vircgroup.c   |  2 +-
 src/util/virhash.c     | 15 ++++++++++++++-
 src/util/virhash.h     | 10 ++++++++++
 4 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
index d0026942aa..dd8e04576a 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -1037,14 +1037,14 @@ virDomainPCIAddressSetExtensionAlloc(virDomainPCIAddressSetPtr addrs,
         if (VIR_ALLOC(addrs->zpciIds) < 0)
             return -1;

-        if (!(addrs->zpciIds->uids = virHashCreateFull(10, NULL,
+        if (!(addrs->zpciIds->uids = virHashCreateFull(10, NULL, NULL,
                                                        virZPCIAddrKeyCode,
                                                        virZPCIAddrKeyEqual,
                                                        virZPCIAddrKeyCopy,
                                                        virZPCIAddrKeyFree)))
             goto error;

-        if (!(addrs->zpciIds->fids = virHashCreateFull(10, NULL,
+        if (!(addrs->zpciIds->fids = virHashCreateFull(10, NULL, NULL,
                                                        virZPCIAddrKeyCode,
                                                        virZPCIAddrKeyEqual,
                                                        virZPCIAddrKeyCopy,
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index d824aee86d..21c0fe67e3 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -2600,7 +2600,7 @@ virCgroupKillRecursive(virCgroupPtr group, int signum)
     bool backendAvailable = false;
     virCgroupBackendPtr *backends = virCgroupBackendGetAll();
     virHashTablePtr pids = virHashCreateFull(100,
-                                             NULL,
+                                             NULL, NULL,
                                              virCgroupPidCode,
                                              virCgroupPidEqual,
                                              virCgroupPidCopy,
diff --git a/src/util/virhash.c b/src/util/virhash.c
index a7fc620567..4d90fa5333 100644
--- a/src/util/virhash.c
+++ b/src/util/virhash.c
@@ -56,6 +56,7 @@ struct _virHashTable {
     size_t size;
     size_t nbElems;
     virHashDataFree dataFree;
+    virHashDataFreeSimple dataFreeSimple;
     virHashKeyCode keyCode;
     virHashKeyEqual keyEqual;
     virHashKeyCopy keyCopy;
@@ -133,6 +134,7 @@ virHashComputeKey(const virHashTable *table, const void *name)
  */
 virHashTablePtr virHashCreateFull(ssize_t size,
                                   virHashDataFree dataFree,
+                                  virHashDataFreeSimple dataFreeSimple,
                                   virHashKeyCode keyCode,
                                   virHashKeyEqual keyEqual,
                                   virHashKeyCopy keyCopy,
@@ -149,7 +151,10 @@ virHashTablePtr virHashCreateFull(ssize_t size,
     table->seed = virRandomBits(32);
     table->size = size;
     table->nbElems = 0;
-    table->dataFree = dataFree;
+    if (dataFree)
+        table->dataFree = dataFree;
+    else
+        table->dataFreeSimple = dataFreeSimple;
     table->keyCode = keyCode;
     table->keyEqual = keyEqual;
     table->keyCopy = keyCopy;
@@ -177,6 +182,7 @@ virHashTablePtr virHashCreate(ssize_t size, virHashDataFree dataFree)
 {
     return virHashCreateFull(size,
                              dataFree,
+                             NULL,
                              virHashStrCode,
                              virHashStrEqual,
                              virHashStrCopy,
@@ -298,6 +304,8 @@ virHashFree(virHashTablePtr table)

             if (table->dataFree)
                 table->dataFree(iter->payload, iter->name);
+            if (table->dataFreeSimple)
+                table->dataFreeSimple(iter->payload);
             if (table->keyFree)
                 table->keyFree(iter->name);
             VIR_FREE(iter);
@@ -330,6 +338,8 @@ virHashAddOrUpdateEntry(virHashTablePtr table, const void *name,
             if (is_update) {
                 if (table->dataFree)
                     table->dataFree(entry->payload, entry->name);
+                if (table->dataFreeSimple)
+                    table->dataFreeSimple(entry->payload);
                 entry->payload = userdata;
                 return 0;
             } else {
@@ -456,9 +466,12 @@ void *virHashSteal(virHashTablePtr table, const void *name)
     void *data = virHashLookup(table, name);
     if (data) {
         virHashDataFree dataFree = table->dataFree;
+        virHashDataFreeSimple dataFreeSimple = table->dataFreeSimple;
         table->dataFree = NULL;
+        table->dataFreeSimple = NULL;
         virHashRemoveEntry(table, name);
         table->dataFree = dataFree;
+        table->dataFreeSimple = dataFreeSimple;
     }
     return data;
 }
diff --git a/src/util/virhash.h b/src/util/virhash.h
index b5e7c79260..94fe8e23e4 100644
--- a/src/util/virhash.h
+++ b/src/util/virhash.h
@@ -30,6 +30,15 @@ typedef virHashAtomic *virHashAtomicPtr;
  * Callback to free data from a hash.
  */
 typedef void (*virHashDataFree) (void *payload, const void *name);
+/**
+ * virHashDataFreeSimple:
+ * @payload:  the data in the hash
+ * @name:  the name associated
+ *
+ * Callback to free data from a hash.
+ */
+typedef void (*virHashDataFreeSimple) (void *payload);
+
 /**
  * virHashIterator:
  * @payload: the data in the hash
@@ -104,6 +113,7 @@ virHashAtomicPtr virHashAtomicNew(ssize_t size,
                                   virHashDataFree dataFree);
 virHashTablePtr virHashCreateFull(ssize_t size,
                                   virHashDataFree dataFree,
+                                  virHashDataFreeSimple dataFreeSimple,
                                   virHashKeyCode keyCode,
                                   virHashKeyEqual keyEqual,
                                   virHashKeyCopy keyCopy,
-- 
2.21.0