Re: [PATCH v2 41/73] qemu: Generalize macro for getting VIR_MIGRATE_* typed params

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On Wed, Apr 11, 2018 at 04:41:31PM +0200, Jiri Denemark wrote:
So far it's used only for CPU throttling parameters which are all ints,
but we'll soon want to use it for more parameters with different types.

Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
---
src/qemu/qemu_migration_params.c | 31 +++++++++++++++----------------
1 file changed, 15 insertions(+), 16 deletions(-)

diff --git a/src/qemu/qemu_migration_params.c b/src/qemu/qemu_migration_params.c
index 369e560990..e0cbdb1a38 100644
--- a/src/qemu/qemu_migration_params.c
+++ b/src/qemu/qemu_migration_params.c
@@ -112,6 +112,17 @@ qemuMigrationParamsFree(qemuMigrationParamsPtr migParams)
}


+#define GET(API, PARAM, VAR) \
+    do { \
+        int rc; \
+        if ((rc = API(params, nparams, VIR_MIGRATE_PARAM_ ## PARAM, \
+                      &migParams->params.VAR)) < 0) \
+            goto error; \
+ \
+        if (rc == 1) \
+            migParams->params.VAR ## _set = true; \
+    } while (0)
+
qemuMigrationParamsPtr
qemuMigrationParamsFromFlags(virTypedParameterPtr params,
                             int nparams,
@@ -135,27 +146,13 @@ qemuMigrationParamsFromFlags(virTypedParameterPtr params,
        }
    }

-#define GET(PARAM, VAR) \
-    do { \
-        int rc; \
-        if ((rc = virTypedParamsGetInt(params, nparams, \
-                                       VIR_MIGRATE_PARAM_ ## PARAM, \
-                                       &migParams->params.VAR)) < 0) \
-            goto error; \
- \
-        if (rc == 1) \
-            migParams->params.VAR ## _set = true; \
-    } while (0)
-
    if (params) {
        if (party == QEMU_MIGRATION_SOURCE) {
-            GET(AUTO_CONVERGE_INITIAL, cpuThrottleInitial);
-            GET(AUTO_CONVERGE_INCREMENT, cpuThrottleIncrement);
+            GET(virTypedParamsGetInt, AUTO_CONVERGE_INITIAL, cpuThrottleInitial);
+            GET(virTypedParamsGetInt, AUTO_CONVERGE_INCREMENT, cpuThrottleIncrement);

If all the getter APIs start with virTypedParamsGet, you can hide the
prefix inside the macro definition to save columns.

Regardless:

Reviewed-by: Ján Tomko <jtomko@xxxxxxxxxx>

Jano

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