2. Core Types and Enumerations

2.1. Error Types

typedef enum cuObjErr_enum {
    CU_OBJ_SUCCESS = 0,
    CU_OBJ_FAIL = 1
} cuObjErr_t;

2.2. Protocol Types

typedef enum cuObjProto_enum {
    CUOBJ_PROTO_RDMA_DC_V1 = 1001,
    CUOBJ_PROTO_MAX
} cuObjProto_t;

CUOBJ_PROTO_RDMA_DC_V1 is the supported protocol value for cuObjServer. Current behavior accepts the proto argument in the constructor and does not report an error for unsupported values.

2.3. Operation Types

typedef enum cuObjOpType_enum {
    CUOBJ_GET = 0,
    CUOBJ_PUT = 1,
    CUOBJ_INVALID = 9999
} cuObjOpType_t;

CUOBJ_GET and CUOBJ_PUT are the operation values used by the server I/O path.

2.4. Channel ID States

typedef enum cuObjChannelIdState_enum {
    CHANNEL_ID_FREE = 0,
    CHANNEL_ID_ALLOCATED = 1,
    CHANNEL_ID_IN_USE = 2,
    INVALID_CHANNEL_ID = UINT16_MAX
} cuObjChannelIdState_t;

Applications normally use only INVALID_CHANNEL_ID, which is returned by allocateChannelId() when no channel is available.

2.5. Delay Modes

typedef enum cuObjDelayMode {
    CUOBJ_DELAY_NONE = 0,
    CUOBJ_DELAY_BATCH = 1,
    CUOBJ_DELAY_ENTRY = 2,
    CUOBJ_DELAY_ADAPTIVE = 3,
    CUOBJ_DELAY_INVALID = 4
} cuObjDelayMode_t;

Delay mode controls the polling behavior used by synchronous handleGetObject() and handlePutObject() calls. The default is CUOBJ_DELAY_BATCH.