Function dr_num_registered_clients 

pub unsafe extern "C" fn dr_num_registered_clients(
    process_name: *const c_char,
    pid: process_id_t,
    global: bool_,
    dr_platform: dr_platform_t,
) -> usize

Retrieve the number of clients registered for a particular process for the current user.

\param[in] process_name A NULL-terminated string specifying the name of the target process. The string should identify the base name of the process, not the full path of the executable (e.g., calc.exe).

\param[in] pid A process id of a target process, typically just created and suspended via dr_inject_process_exit(). If pid != 0, the one-time configuration for that pid will be queried. If pid == 0, the general configuration for process_name will be queried.

\param[in] global Whether to use global or user-local config files. On Windows, global config files are stored in a dir pointed at by the DYNAMORIO_HOME registry key. On Linux, they are in /etc/dynamorio. Administrative privileges may be needed if global is true. Note that DynamoRIO gives local config files precedence when both exist. The caller must separately create the global directory.

\param[in] dr_platform Configurations are kept separate for 32-bit processes and 64-bit processes. This parameter allows selecting which of those configurations to unset.

\return The number of clients registered for the given process and platform. An alternative bitwidth client is counted as a separate client.