diff options
Diffstat (limited to 'lib/libmemstat/memstat.h')
| -rw-r--r-- | lib/libmemstat/memstat.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/lib/libmemstat/memstat.h b/lib/libmemstat/memstat.h index 823338b..c2e3174 100644 --- a/lib/libmemstat/memstat.h +++ b/lib/libmemstat/memstat.h @@ -61,6 +61,19 @@ #define MEMTYPE_MAXNAME 32 /* + * Library error conditions, mostly from the underlying data sources. On + * failure, functions typically return (-1) or (NULL); on success, (0) or a + * valid data pointer. The error from the last operation is stored in + * struct memory_type, and accessed via memstat_get_error(mtp). + */ +#define MEMSTAT_ERROR_UNDEFINED 0 /* Initialization value. */ +#define MEMSTAT_ERROR_NOMEMORY 1 /* Out of memory. */ +#define MEMSTAT_ERROR_VERSION 2 /* Unsupported version. */ +#define MEMSTAT_ERROR_PERMISSION 3 /* Permission denied. */ +#define MEMSTAT_ERROR_TOOMANYCPUS 4 /* Too many CPUs. */ +#define MEMSTAT_ERROR_DATAERROR 5 /* Error in stat data. */ + +/* * Forward declare struct memory_type, which holds per-type properties and * statistics. This is an opaque type, to be frobbed only from within the * library, in order to avoid building ABI assumptions into the application. @@ -85,6 +98,7 @@ struct memory_type *memstat_mtl_next(struct memory_type *mtp); struct memory_type *memstat_mtl_find(struct memory_type_list *list, int allocator, const char *name); void memstat_mtl_free(struct memory_type_list *list); +int memstat_mtl_geterror(struct memory_type_list *list); /* * Functions to retrieve data from a live kernel using sysctl. @@ -94,7 +108,7 @@ int memstat_sysctl_malloc(struct memory_type_list *list, int flags); int memstat_sysctl_uma(struct memory_type_list *list, int flags); /* - * Accessor methods for struct memory_type_list. + * Accessor methods for struct memory_type. */ const char *memstat_get_name(const struct memory_type *mtp); int memstat_get_allocator(const struct memory_type *mtp); |
