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DbEnv::mutex_stat |
#include <db_cxx.h>int DbEnv::mutex_stat(DB_MUTEX_STAT **statp, u_int32_t flags);
int DbEnv::mutex_stat_print(u_int32_t flags);
The DbEnv::mutex_stat method returns the mutex subsystem statistics.
The DbEnv::mutex_stat method creates a statistical structure of type DB_MUTEX_STAT and copies a pointer to it into a user-specified memory location.
Statistical structures are stored in allocated memory. If application-specific allocation routines have been declared (see DbEnv::set_alloc for more information), they are used to allocate the memory; otherwise, the standard C library malloc(3) is used. The caller is responsible for deallocating the memory. To deallocate the memory, free the memory reference; references inside the returned memory need not be individually freed.
The following DB_MUTEX_STAT fields will be filled in:
The DbEnv::mutex_stat method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success.
The DbEnv::mutex_stat method may fail and throw DbException, encapsulating one of the following non-zero errors, or return one of the following non-zero errors:
The DbEnv::mutex_stat_print method displays the mutex subsystem statistical information, as described for the DbEnv::mutex_stat method. The information is printed to a specified output channel (see the DbEnv::set_msgfile method for more information), or passed to an application callback function (see the DbEnv::set_msgcall method for more information).
The DbEnv::mutex_stat_print method may not be called before the DbEnv::open method has been called.
The DbEnv::mutex_stat_print method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success.
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