qapi: Use QAPI_LIST_PREPEND() where possible

Anywhere we create a list of just one item or by prepending items
(typically because order doesn't matter), we can use
QAPI_LIST_PREPEND().  But places where we must keep the list in order
by appending remain open-coded until later patches.

Note that as a side effect, this also performs a cleanup of two minor
issues in qga/commands-posix.c: the old code was performing
 new = g_malloc0(sizeof(*ret));
which 1) is confusing because you have to verify whether 'new' and
'ret' are variables with the same type, and 2) would conflict with C++
compilation (not an actual problem for this file, but makes
copy-and-paste harder).

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20201113011340.463563-5-eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
[Straightforward conflicts due to commit a8aa94b5f8 "qga: update
schema for guest-get-disks 'dependents' field" and commit a10b453a52
"target/mips: Move mips_cpu_add_definition() from helper.c to cpu.c"
resolved.  Commit message tweaked.]
Signed-off-by: Markus Armbruster <armbru@redhat.com>

1 files changed, 23 insertions, 25 deletions

diff --git a/tests/test-qobject-output-visitor.c b/tests/test-qobject-output-visitor.c
index 1c856d9bd2..b20ab8b29b 100644
--- a/tests/test-qobject-output-visitor.c
+++ b/tests/test-qobject-output-visitor.c
@@ -223,7 +223,8 @@ static void test_visitor_out_list(TestOutputVisitorData *data,
                                   const void *unused)
 {
     const char *value_str = "list value";
-    TestStructList *p, *head = NULL;
+    TestStruct *value;
+    TestStructList *head = NULL;
     const int max_items = 10;
     bool value_bool = true;
     int value_int = 10;
@@ -233,14 +234,12 @@ static void test_visitor_out_list(TestOutputVisitorData *data,
 
     /* Build the list in reverse order... */
     for (i = 0; i < max_items; i++) {
-        p = g_malloc0(sizeof(*p));
-        p->value = g_malloc0(sizeof(*p->value));
-        p->value->integer = value_int + (max_items - i - 1);
-        p->value->boolean = value_bool;
-        p->value->string = g_strdup(value_str);
-
-        p->next = head;
-        head = p;
+        value = g_malloc0(sizeof(*value));
+        value->integer = value_int + (max_items - i - 1);
+        value->boolean = value_bool;
+        value->string = g_strdup(value_str);
+
+        QAPI_LIST_PREPEND(head, value);
     }
 
     visit_type_TestStructList(data->ov, NULL, &head, &error_abort);
@@ -270,26 +269,25 @@ static void test_visitor_out_list(TestOutputVisitorData *data,
 static void test_visitor_out_list_qapi_free(TestOutputVisitorData *data,
                                             const void *unused)
 {
-    UserDefTwoList *p, *head = NULL;
+    UserDefTwo *value;
+    UserDefTwoList *head = NULL;
     const char string[] = "foo bar";
     int i, max_count = 1024;
 
     for (i = 0; i < max_count; i++) {
-        p = g_malloc0(sizeof(*p));
-        p->value = g_malloc0(sizeof(*p->value));
-
-        p->value->string0 = g_strdup(string);
-        p->value->dict1 = g_new0(UserDefTwoDict, 1);
-        p->value->dict1->string1 = g_strdup(string);
-        p->value->dict1->dict2 = g_new0(UserDefTwoDictDict, 1);
-        p->value->dict1->dict2->userdef = g_new0(UserDefOne, 1);
-        p->value->dict1->dict2->userdef->string = g_strdup(string);
-        p->value->dict1->dict2->userdef->integer = 42;
-        p->value->dict1->dict2->string = g_strdup(string);
-        p->value->dict1->has_dict3 = false;
-
-        p->next = head;
-        head = p;
+        value = g_malloc0(sizeof(*value));
+
+        value->string0 = g_strdup(string);
+        value->dict1 = g_new0(UserDefTwoDict, 1);
+        value->dict1->string1 = g_strdup(string);
+        value->dict1->dict2 = g_new0(UserDefTwoDictDict, 1);
+        value->dict1->dict2->userdef = g_new0(UserDefOne, 1);
+        value->dict1->dict2->userdef->string = g_strdup(string);
+        value->dict1->dict2->userdef->integer = 42;
+        value->dict1->dict2->string = g_strdup(string);
+        value->dict1->has_dict3 = false;
+
+        QAPI_LIST_PREPEND(head, value);
     }
 
     qapi_free_UserDefTwoList(head);