library: provide ref and unref for diskstat
While procps_diskstat_ref and procps_diskstat_unref were declared they actually weren't implemented in the library. Linking some binary that used these functions gave the following errors: CCLD vmstat vmstat.o: In function `disksum_format': vmstat.c:719: undefined reference to `procps_diskstat_unref' vmstat.o: In function `diskformat': vmstat.c:591: undefined reference to `procps_diskstat_unref'
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@ -226,6 +226,29 @@ PROCPS_EXPORT int procps_diskstat_read (
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return 0;
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}
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PROCPS_EXPORT int procps_diskstat_ref (
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struct procps_diskstat *info)
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{
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if (info == NULL)
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return -EINVAL;
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info->refcount++;
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return info->refcount;
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}
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PROCPS_EXPORT int procps_diskstat_unref (
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struct procps_diskstat **info)
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{
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if (info == NULL || *info == NULL)
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return -EINVAL;
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(*info)->refcount--;
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if ((*info)->refcount == 0) {
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free(*info);
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*info = NULL;
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return 0;
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}
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return (*info)->refcount;
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}
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/*
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* procps_diskstat_dev_count:
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*
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