static bool writeDist(int fd, const char* filename, const DistMat& M, uint64_t* bytes)
{
struct layer_header header;
header.rank = (uint64_t) M.Grid().Rank();
header.width = (uint64_t) M.Width();
header.height = (uint64_t) M.Height();
header.localwidth = (uint64_t) M.LocalWidth();
header.localheight = (uint64_t) M.LocalHeight();
header.ldim = (uint64_t) M.LDim();
ssize_t write_rc = write(fd, &header, sizeof(header));
if (write_rc != sizeof(header)) {
// error!
}
*bytes += write_rc;
const Int localHeight = M.LocalHeight();
const Int localWidth = M.LocalWidth();
const Int lDim = M.LDim();
if(localHeight == lDim) {
void* buf = (void*) M.LockedBuffer();
size_t bufsize = localHeight * localWidth * sizeof(DataType);
write_rc = write(fd, buf, bufsize);
if (write_rc != bufsize) {
// error!
}
*bytes += write_rc;
} else {
for(Int j = 0; j < localWidth; ++j) {
void* buf = (void*) M.LockedBuffer(0, j);
size_t bufsize = localHeight * sizeof(DataType);
write_rc = write(fd, buf, bufsize);
if (write_rc != bufsize) {
// error!
}
*bytes += write_rc;
}
}
return true;
}
static bool readDist(int fd, const char* filename, DistMat& M, uint64_t* bytes)
{
struct layer_header header;
ssize_t read_rc = read(fd, &header, sizeof(header));
if (read_rc != sizeof(header)) {
// error!
}
*bytes += read_rc;
// check that header values match up
Int height = header.height;
Int width = header.width;
M.Resize(height, width);
if(M.ColStride() == 1 && M.RowStride() == 1) {
if(M.Height() == M.LDim()) {
void* buf = (void*) M.Buffer();
size_t bufsize = height * width * sizeof(DataType);
read_rc = read(fd, buf, bufsize);
if (read_rc != bufsize) {
// error!
}
*bytes += read_rc;
} else {
for(Int j = 0; j < width; ++j) {
void* buf = (void*) M.Buffer(0, j);
size_t bufsize = height * sizeof(DataType);
read_rc = read(fd, buf, bufsize);
if (read_rc != bufsize) {
// error!
}
*bytes += read_rc;
}
}
} else {
const Int localHeight = M.LocalHeight();
const Int localWidth = M.LocalWidth();
const Int lDim = M.LDim();
if(localHeight == lDim) {
void* buf = (void*) M.Buffer();
size_t bufsize = localHeight * localWidth * sizeof(DataType);
read_rc = read(fd, buf, bufsize);
if (read_rc != bufsize) {
// error!
}
*bytes += read_rc;
} else {
for(Int jLoc = 0; jLoc < localWidth; ++jLoc) {
void* buf = (void*) M.Buffer(0, jLoc);
size_t bufsize = localHeight * sizeof(DataType);
read_rc = read(fd, buf, bufsize);
if (read_rc != bufsize) {
// error!
}
*bytes += read_rc;
}
}
}
return true;
}
