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libvirt.h.in: Add new cpumap macro VIR_CPU_USED

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New macro VIR_CPU_USED added to facilitate the interpretation of
cpu maps.
Further, hardened the other cpumap macros against invocations
like VIR_CPU_USE(cpumap + 1, cpu)

Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Viktor Mihajlovski 2012-10-16 16:05:12 +02:00 committed by Eric Blake
parent d804d35fac
commit d39291d4c0
1 changed files with 24 additions and 13 deletions
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37
include/libvirt/libvirt.h.in
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@ -2045,10 +2045,10 @@ int virDomainGetEmulatorPinInfo (virDomainPtr domain,
* @cpu: the physical CPU number
*
* This macro is to be used in conjunction with virDomainPinVcpu() API.
* USE_CPU macro set the bit (CPU usable) of the related cpu in cpumap.
* It sets the bit (CPU usable) of the related cpu in cpumap.
*/
#define VIR_USE_CPU(cpumap,cpu) (cpumap[(cpu)/8] |= (1<<((cpu)%8)))
#define VIR_USE_CPU(cpumap, cpu) ((cpumap)[(cpu) / 8] |= (1 << ((cpu) % 8)))
/**
* VIR_UNUSE_CPU:
@ -2056,10 +2056,21 @@ int virDomainGetEmulatorPinInfo (virDomainPtr domain,
* @cpu: the physical CPU number
*
* This macro is to be used in conjunction with virDomainPinVcpu() API.
* USE_CPU macro reset the bit (CPU not usable) of the related cpu in cpumap.
* It resets the bit (CPU not usable) of the related cpu in cpumap.
*/
#define VIR_UNUSE_CPU(cpumap,cpu) (cpumap[(cpu)/8] &= ~(1<<((cpu)%8)))
#define VIR_UNUSE_CPU(cpumap, cpu) ((cpumap)[(cpu) / 8] &= ~(1 << ((cpu) % 8)))
/**
* VIR_CPU_USED:
* @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN)
* @cpu: the physical CPU number
*
* This macro can be used in conjunction with virNodeGetCPUMap() API.
* It returns non-zero if the bit of the related CPU is set.
*/
#define VIR_CPU_USED(cpumap, cpu) ((cpumap)[(cpu) / 8] & (1 << ((cpu) % 8)))
/**
* VIR_CPU_MAPLEN:
@ -2070,7 +2081,7 @@ int virDomainGetEmulatorPinInfo (virDomainPtr domain,
* CPU map between a single virtual & all physical CPUs of a domain.
*/
#define VIR_CPU_MAPLEN(cpu) (((cpu)+7)/8)
#define VIR_CPU_MAPLEN(cpu) (((cpu) + 7) / 8)
int virDomainGetVcpus (virDomainPtr domain,
@ -2087,12 +2098,12 @@ int virDomainGetVcpus (virDomainPtr domain,
* @cpu: the physical CPU number
*
* This macro is to be used in conjunction with virDomainGetVcpus() API.
* VIR_CPU_USABLE macro returns a non zero value (true) if the cpu
* VIR_CPU_USABLE macro returns a non-zero value (true) if the cpu
* is usable by the vcpu, and 0 otherwise.
*/
#define VIR_CPU_USABLE(cpumaps,maplen,vcpu,cpu) \
(cpumaps[((vcpu)*(maplen))+((cpu)/8)] & (1<<((cpu)%8)))
#define VIR_CPU_USABLE(cpumaps, maplen, vcpu, cpu) \
VIR_CPU_USED(VIR_GET_CPUMAP(cpumaps, maplen, vcpu), cpu)
/**
* VIR_COPY_CPUMAP:
@ -2104,12 +2115,12 @@ int virDomainGetVcpus (virDomainPtr domain,
* (ie: malloc(maplen))
*
* This macro is to be used in conjunction with virDomainGetVcpus() and
* virDomainPinVcpu() APIs. VIR_COPY_CPUMAP macro extract the cpumap of
* the specified vcpu from cpumaps array and copy it into cpumap to be used
* virDomainPinVcpu() APIs. VIR_COPY_CPUMAP macro extracts the cpumap of
* the specified vcpu from cpumaps array and copies it into cpumap to be used
* later by virDomainPinVcpu() API.
*/
#define VIR_COPY_CPUMAP(cpumaps,maplen,vcpu,cpumap) \
memcpy(cpumap, &(cpumaps[(vcpu)*(maplen)]), (maplen))
#define VIR_COPY_CPUMAP(cpumaps, maplen, vcpu, cpumap) \
memcpy(cpumap, VIR_GET_CPUMAP(cpumaps, maplen, vcpu), maplen)
/**
@ -2122,7 +2133,7 @@ int virDomainGetVcpus (virDomainPtr domain,
* virDomainPinVcpu() APIs. VIR_GET_CPUMAP macro returns a pointer to the
* cpumap of the specified vcpu from cpumaps array.
*/
#define VIR_GET_CPUMAP(cpumaps,maplen,vcpu) &(cpumaps[(vcpu)*(maplen)])
#define VIR_GET_CPUMAP(cpumaps, maplen, vcpu) (&((cpumaps)[(vcpu) * (maplen)]))
typedef enum {