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rsm_memseg_import_put, rsm_memseg_import_put8, rsm_memseg_import_put16, rsm_memseg_import_put32, rsm_memseg_import_put64 - write to a segment

cc [ flag... ] file... -lrsm [ library... ]
#include <rsmapi.h>

int rsm_memseg_import_put(rsm_memseg_import_handle_t im_memseg,
 off_t offset, void *src_addr, size_t length);

int rsm_memseg_import_put8(rsm_memseg_import_handle_t im_memseg,
 off_t offset, uint8_t datap, ulong_t rep_cnt);

int rsm_memseg_import_put16(rsm_memseg_import_handle_t im_memseg,
 off_t offset, uint16_t datap, ulong_t rep_cnt);

int rsm_memseg_import_put32(rsm_memseg_import_handle_t im_memseg,
 off_t offset, uint32_t datap, ulong_t rep_cnt);

int rsm_memseg_import_put64(rsm_memseg_import_handle_t im_memseg,
 off_t offset, uint64_t datap, ulong_t rep_cnt);

When using interconnects that allow memory mapping (see rsm_memseg_import_map(3RSM)), standard CPU memory operations may be used for accessing memory of a segment. If, however, a mapping is not provided, then explicitly calling these functions facilitates writing to a segment. Depending on the attributes of the extension library for the interconnect, these functions may involve doing an implicit mapping before performing the data transfer. Applications can be made interconnect-independent with respect to segment writes by using these functions. The data access error detection is performed through the use of barriers (see rsm_memseg_import_open_barrier(3RSM)). The default barrier operation mode is RSM_BARRIER_MODE_IMPLICIT, which means that around every put operation open and close barrier operations are performed automatically. Explicit error handling may also be set up for these functions (see rsm_memseg_import_set_mode(3RSM)).

The rsm_memseg_import_put() function copies length bytes from local memory with start address src_addr to the imported segment im_memseg beginning at location offset from the start of the segment.

The rsm_memseg_import_put8() function copies rep_cnt number of 8-bit quantities from successive local memory locations pointed to by datap to successive locations starting from offset in the imported segment.

The rsm_memseg_import_put16() function copies rep_cnt number of 16-bit quantities from successive local memory locations pointed to by datap to successive locations starting from offset in the imported segment. The offset must be aligned at half-word address boundary.

The rsm_memseg_import_put32() function copies rep_cnt number of 32-bit quantities from successive local memory locations pointed to by datap to successive locations starting from offset in the imported segment. The offset must be aligned at word address boundary.

The rsm_memseg_import_put64() function copies rep_cnt number of 64-bit quantities from successive local memory locations pointed to by datap to successive locations starting from offset in the imported segment. The offset must be aligned at double-word address boundary.

The data transfer functions that transfer small quantities of data (that is, 8-, 16-, 32-, and 64-bit quantities) perform byte swapping prior to the data transfer, in the event that the source and destination have incompatible endian characteristics.

Upon successful completion, these functions return 0. Otherwise, an error value is returned to indicate the error.

These functions can return the following errors: RSMERR_BAD_SEG_HNDL

RSMERR_BAD_ADDR RSMERR_BAD_MEM_ALIGNMENT RSMERR_BAD_OFFSET RSMERR_BAD_LENGTH RSMERR_PERM_DENIED RSMERR_INSUFFICIENT_RESOURCES RSMERR_BARRIER_UNINITIALIZED RSMERR_BARRIER_FAILURE RSMERR_CONN_ABORTED

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

Interface Stability Evolving

MT-Level MT-Safe

rsm_memseg_import_get(3RSM), rsm_memseg_import_init_barrier(3RSM), rsm_memseg_import_open_barrier(3RSM), rsm_memseg_import_set_mode(3RSM), attributes(5)