The first call to WSAStartup initiates the use of TCP/IP by an RTSS process. Subsequent calls to WSAStartup increase a startup count. An application must perform an equal number of WSACleanup calls, which would decrease a startup count. The final call performs an actual cleanup.
Syntax
int WSAStartup(
[in] WORD wVersionRequested,
[out] LPWSADATA lpWSAData
);Parameters
[in] wVersionRequested
The highest version of Winsock support that the caller can use. The high order byte specifies the minor version (revision) number; the low-order byte specifies the major version number.
[out] lpWSAData
A pointer to the WSADATA data structure that is to receive details of the Winsock implementation.
Return Value
0 (zero) if the function succeeds.
If the function succeeds, it returns 0 (zero). If the function fails, it returns one of the following error codes:
|
Error code |
Description |
|---|---|
|
WSAEFAULT |
The lpWSAData parameter is an invalid pointer. |
|
WSAVERNOTSUPPORTED |
The version of Winsock support requested is not provided by this Winsock implementation. |
|
WSASYSNOTREADY |
Network Subsystem is not ready for network communications. |
Requirements
| Minimum supported version | Header | Library |
|---|---|---|
|
wRTOS 1.0 SDK |
winsock2.h |
RttcpipApi.lib |
