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