Data Structures
// Values for the state of a resource - returned by the
// monitor entry point.
enum VCSAgResState {
VCSAgResOffline, // Resource is offline.
VCSAgResOnline, // Resource is online.
VCSAgResUnknown // Resource is neither online nor offline.
};
// Values for the reason why the clean entry point
// is called.
enum VCSAgWhyClean {
VCSAgCleanOfflineHung, // offline entry point did
// not complete within the
// expected time.
VCSAgCleanOfflineIneffective, // offline entry point
// was ineffective.
VCSAgCleanOnlineHung, // online entry point did
// not complete within the
// expected time.
VCSAgCleanOnlineIneffective, // online entry point
// was ineffective.
VCSAgCleanUnexpectedOffline, // the resource became
// offline unexpectedly.
VCSAgCleanMonitorHung // monitor entry point did
// not complete within the
// expected time.
};
// Structure used to register the entry points.
typedef struct {
void (*open)(const char *res_name, void **attr_val);
void (*close)(const char *res_name, void **attr_val);
VCSAgResState (*monitor)(const char *res_name,
void **attr_val, int, *conf_level);
unsigned int (*online)(const char *res_name,
void **attr_val);
unsigned int (*offline)(const char *res_name,
void **attr_val);
unsigned int (*action) (const char *res_name, const char
*action_token, void **attr_val, char **action_args,
char *action_output);
unsigned int (*info) (const char *res_name, VCSAgResInfoOp
resinfo_op, void **attr_val, char **info_output, char
***opt_update_args, char ***opt_add_args);
void (*attr_changed)(const char *res_name,
const char *changed_res_name, const char
*changed_attr_name, void **new_val);
unsigned int (*clean)(const char *res_name,
VCSAgWhyClean reason, void **attr_val);
void (*shutdown) ();
} VCSAgV40EntryPointStruct;
The structure VCSAgV40EntryPointStruct consists of function pointers, one for each VCS entry point except VCSAgStartup. The VCSAgStartup entry point is called by name, and therefore must be implemented using C++ and named VCSAgStartup.
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