RMCALLS.LIB

The RMCALLS library code linked to a driver will provide rudimentary support for cases in which RESOURCE.SYS is not loaded on a system. Typically, a handle value of -1L and a return code of RMRC_SUCCESS will occur. In this manner, the driver code might not need to know about the presence of RESOURCE.SYS on a system, and can assume that all resources are available. This was the behavior previous to implementing Resource Manager.

• RMADDToHDevice
• RMAdjToHandleList
• RMAllocResource
• RMConvertID
• RMCreateAdapter
• RMCreateDetected
• RMCreateDevice
• RMCreateDriver
• RMCreateLDev
• RMCreateSysName
• RMDeAllocResource
• RMDestroyAdapter
• RMDestroyDetected
• RMDestroyDevice
• RMDestroyDriver
• RMDestroyLDev
• RMDestroySysName
• RMDevIDToHandleList
• RMGetCommandLine
• RMGetDriverName
• RMGetNodeInfo
• RMGetVersion
• RMHandleToParent
• RMHandleToResourceHandleList
• RMHandleToType
• RMHDevToHLDev
• RMKeyToHandleList
• RMModifyNodeFlags
• RMModifyResources
• RMParseSCSIInquiry
• RMResToHandleList
• RMUpdateAdjunct

RMCALLS Library Data

The RMCALLS library references the following four variables:

PFN Device_Help;
ULONG RMFlags = NULL;
PFNRM RM_Help0 = NULL;
PFNRM RM_Help3 = NULL;

The PFN Device_Help variable must be initialized by your driver prior to calling any Resource Manager services. It is expected to contain the Device Help entry point provided in the OS/2 Init Request Packet your driver receives.

Prior to calling any Resource Manager services, the remaining data variables must be initialized to zero. Specify C-initializers when declaring the variables.

These variables must be allocated by your driver. If you plan to use Resource Manager services after your driver has completed initialization, you must ensure that these variables are not discarded.

Note: If you do not declare these variables, a linker error message will occur, indicating that they are missing.

RMCALLS Library Code

The code portion of the RMCALLS library is included in a segment named RMCode. There are three alternatives in handling the code in this segment:

• Combine RMCode with your driver's default code segment if your driver does not intend to use Resource Manager services after initialization. Because the library code is linked after OBJ text, it would be discarded as your driver discards its initialization code.
• Combine RMCode with your driver's swappable code segment. If your driver intends to use Resource Manager services after its initialization and has a swappable code segment, then combine RMCode with this segment.
• Place RMCode in its own swappable segment. If your driver does not have a swappable code segment, then the RMCode will reside in its own swappable segment by default.

Return Codes

Resource Manager return codes. All Resource Manager services return a 16-bit return code.

• RMRC BAD ADAPTERHANDLE
• RMRC BAD DETECTHANDLE
• RMRC BAD DEVHELP
• RMRC BAD DEVICEHANDLE
• RMRC BAD DRIVERHANDLE
• RMRC BAD FLAGS
• RMRC BAD LDEVHANDLE
• RMRC BAD RESOURCEHANDLE
• RMRC BAD SYSNAMEHANDLE
• RMRC BAD VERSION
• RMRC BUFFER TOO SMALL
• RMRC INVALID PARM VALUE
• RMRC IRQ ENTRY ILLEGAL
• RMRC NO DETECTED DATA
• RMRC NOT IMPLEMENTED
• RMRC NOT INSTALLED
• RMRC NOTINITIALIZED
• RMRC NULL POINTER
• RMRC NULL STRINGS
• RMRC OUT OF MEMORY
• RMRC RES ALREADY CLAIMED
• RMRC SEARCH FAILED
• RMRC SUCCESS