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#include "commit.h"
#include <errno.h>
#include <string.h>
#include <zstd.h>
static int nfl_commit_default(FILE *f, nfl_header_t *header, nfl_entry_t *store,
uint32_t store_size) {
uint32_t written;
header->raw_size = store_size;
// Write header
written = fwrite(header, 1, sizeof(nfl_header_t), f);
WARN_RETURN(written != sizeof(nfl_header_t), "commit header: %s", strerror(errno));
// Write store
written = fwrite(store, 1, store_size, f);
WARN_RETURN(written != store_size, "commit store: %s", strerror(errno));
return sizeof(nfl_header_t) + store_size;
}
static int nfl_commit_lz4(FILE *f, nfl_header_t *header, nfl_entry_t *store,
uint32_t store_size) {
/* TODO */
return -1;
}
static int nfl_commit_zstd(FILE *f, nfl_header_t *header, nfl_entry_t *store,
uint32_t store_size) {
size_t const bufsize = ZSTD_compressBound(store_size);
void *buf;
WARN_RETURN(!(buf = malloc(bufsize)), "zstd: cannot malloc");
size_t const csize = ZSTD_compress(buf, bufsize, store, store_size, 1);
if (ZSTD_isError(csize)) {
WARN(1, "zstd: %s \n", ZSTD_getErrorName(csize));
free(buf);
return -1;
}
int ret = nfl_commit_default(f, header, buf, csize);
free(buf);
return ret;
}
int nfl_commit_worker(nfl_header_t *header, nfl_entry_t *store,
enum nfl_compression_t compression_opt,
bool truncate,
const char *filename) {
int ret;
FILE *f;
const char *mode = truncate ? "wb" : "ab";
debug("Comm worker #%u: commit to file %s\n", header->id, filename);
ERR((f = fopen(filename, mode)) == NULL, strerror(errno));
// commit store
uint32_t store_size = sizeof(nfl_entry_t) * header->max_n_entries;
switch (compression_opt) {
case COMPRESS_NONE:
debug("Comm worker #%u: commit without compression\n", header->id);
ret = nfl_commit_default(f, header, store, store_size);
break;
case COMPRESS_LZ4:
debug("Comm worker #%u: commit with compression algorithm: lz4", header->id);
ret = nfl_commit_lz4(f, header, store, store_size);
break;
case COMPRESS_ZSTD:
debug("Comm worker #%u: commit with compression algorithm: zstd", header->id);
ret = nfl_commit_zstd(f, header, store, store_size);
break;
// Must not reach here ...
default:
FATAL("Unknown compression option detected");
}
// Do fsync ?
fclose(f);
return ret;
}
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