[libvirt] [PATCH v2 02/21] conf: Add helper to retrieve bitmap of active vcpus for a definition

In some cases it may be better to have a bitmap representing state of individual vcpus rather than iterating the definition. The new helper creates a bitmap representing the state from the domain definition. --- Notes: v2: - renamed src/conf/domain_conf.c | 24 ++++++++++++++++++++++++ src/conf/domain_conf.h | 1 + src/libvirt_private.syms | 1 + 3 files changed, 26 insertions(+) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 1ea74a6..ead76a1 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -1374,6 +1374,30 @@ virDomainDefGetVcpus(const virDomainDef *def) } +/** + * virDomainDefGetOnlineVcpumap: + * @def: domain definition + * + * Returns a bitmap representing state of individual vcpus. + */ +virBitmapPtr +virDomainDefGetOnlineVcpumap(const virDomainDef *def) +{ + virBitmapPtr ret = NULL; + size_t i; + + if (!(ret = virBitmapNew(def->maxvcpus))) + return NULL; + + for (i = 0; i < def->maxvcpus; i++) { + if (def->vcpus[i].online) + ignore_value(virBitmapSetBit(ret, i)); + } + + return ret; +} + + virDomainVcpuInfoPtr virDomainDefGetVcpu(virDomainDefPtr def, unsigned int vcpu) diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 0141009..9fdfdf2 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -2358,6 +2358,7 @@ bool virDomainDefHasVcpusOffline(const virDomainDef *def); unsigned int virDomainDefGetVcpusMax(const virDomainDef *def); int virDomainDefSetVcpus(virDomainDefPtr def, unsigned int vcpus); unsigned int virDomainDefGetVcpus(const virDomainDef *def); +virBitmapPtr virDomainDefGetOnlineVcpumap(const virDomainDef *def); virDomainVcpuInfoPtr virDomainDefGetVcpu(virDomainDefPtr def, unsigned int vcpu) ATTRIBUTE_RETURN_CHECK; diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 3d0ec9d..1083782 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -217,6 +217,7 @@ virDomainDefFree; virDomainDefGetDefaultEmulator; virDomainDefGetMemoryActual; virDomainDefGetMemoryInitial; +virDomainDefGetOnlineVcpumap; virDomainDefGetSecurityLabelDef; virDomainDefGetVcpu; virDomainDefGetVcpus; -- 2.6.2