[libvirt] [PATCH 2/3] util: added virGetLastErrorCode/Domain

[ramyelkest]

Many places in the code call virGetLastError() just to check the
raised error code, or domain. However virGetLastError() can return
NULL, so the code has to check for that first. This patch therefore
introduces virGetLasErrorCode/Domain function which always returns a
valid error code/domain respectively, thus dropping the need to
perform any checks on the error object.

Signed-off-by: Ramy Elkest <ramyelkest at gmail.com>
---
 include/libvirt/virterror.h |  2 ++
 src/libvirt_public.syms     |  6 ++++++
 src/util/virerror.c         | 42 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 50 insertions(+)

diff --git a/include/libvirt/virterror.h b/include/libvirt/virterror.h
index 3e7c7a0..5e58b6a 100644
--- a/include/libvirt/virterror.h
+++ b/include/libvirt/virterror.h
@@ -344,6 +344,8 @@ void                    virResetLastError       (void);
 void                    virResetError           (virErrorPtr err);
 void                    virFreeError            (virErrorPtr err);
 
+int                     virGetLastErrorCode     (void);
+int                     virGetLastErrorDomain   (void);
 const char *            virGetLastErrorMessage  (void);
 
 virErrorPtr             virConnGetLastError     (virConnectPtr conn);
diff --git a/src/libvirt_public.syms b/src/libvirt_public.syms
index 95df3a0..85b6b6d 100644
--- a/src/libvirt_public.syms
+++ b/src/libvirt_public.syms
@@ -785,4 +785,10 @@ LIBVIRT_4.1.0 {
         virStoragePoolLookupByTargetPath;
 } LIBVIRT_3.9.0;
 
+LIBVIRT_4.4.0 {
+    global:
+        virGetLastErrorCode;
+        virGetLastErrorDomain;
+} LIBVIRT_4.1.0;
+
 # .... define new API here using predicted next version number ....
diff --git a/src/util/virerror.c b/src/util/virerror.c
index c000b00..842fc49 100644
--- a/src/util/virerror.c
+++ b/src/util/virerror.c
@@ -272,6 +272,48 @@ virGetLastError(void)
 
 
 /**
+ * virGetLastErrorCode:
+ *
+ * Get the most recent error code
+ *
+ * The error object is kept in thread local storage, so separate
+ * threads can safely access this concurrently.
+ *
+ * Returns the most recent error code in this thread,
+ * or VIR_ERR_OK if none is set
+ */
+int
+virGetLastErrorCode(void)
+{
+    virErrorPtr err = virLastErrorObject();
+    if (!err)
+        return VIR_ERR_OK;
+    return err->code;
+}
+
+
+/**
+ * virGetLastErrorDomain:
+ *
+ * Get the most recent error domain
+ *
+ * The error object is kept in thread local storage, so separate
+ * threads can safely access this concurrently.
+ *
+ * Returns the most recent error code in this thread,
+ * or VIR_FROM_NONE if none is set
+ */
+int
+virGetLastErrorDomain(void)
+{
+    virErrorPtr err = virLastErrorObject();
+    if (!err)
+        return VIR_FROM_NONE;
+    return err->domain;
+}
+
+
+/**
  * virGetLastErrorMessage:
  *
  * Get the most recent error message
-- 
2.7.4