Use a "push" strategy to get data through libz, rather than a "pull" strategy.
This commit is contained in:
parent
d7ccd95be8
commit
5d964b5cc9
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=216257
@ -44,8 +44,6 @@ struct fifolog_writer {
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unsigned syncrate;
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unsigned syncrate;
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unsigned compression;
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unsigned compression;
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unsigned writes_since_sync;
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int cleanup;
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int cleanup;
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intmax_t cnt[FIFOLOG_NPOINT];
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intmax_t cnt[FIFOLOG_NPOINT];
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@ -55,9 +53,11 @@ struct fifolog_writer {
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int flag;
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int flag;
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time_t last;
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time_t last;
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u_int obufsize;
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u_char *obuf;
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u_int ibufsize;
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u_int ibufsize;
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u_char *ibuf;
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u_char *ibuf;
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u_char *iptr;
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time_t starttime;
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time_t starttime;
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time_t lastwrite;
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time_t lastwrite;
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@ -33,6 +33,9 @@
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#include <unistd.h>
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#include <unistd.h>
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#include <time.h>
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#include <time.h>
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#include <sys/endian.h>
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#include <sys/endian.h>
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#if 0
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#include <sys/uio.h>
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#endif
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#include <zlib.h>
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#include <zlib.h>
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@ -65,9 +68,8 @@ fifolog_write_assert(const struct fifolog_writer *f)
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{
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{
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CHECK_OBJ_NOTNULL(f, FIFOLOG_WRITER_MAGIC);
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CHECK_OBJ_NOTNULL(f, FIFOLOG_WRITER_MAGIC);
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assert(f->iptr == f->ff->zs->next_in + f->ff->zs->avail_in);
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assert(f->ff->zs->next_out + f->ff->zs->avail_out == \
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assert(f->ff->zs->next_out + f->ff->zs->avail_out == \
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f->ff->recbuf + f->ff->recsize);
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f->obuf + f->obufsize);
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}
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}
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struct fifolog_writer *
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struct fifolog_writer *
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@ -75,8 +77,8 @@ fifolog_write_new(void)
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{
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{
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struct fifolog_writer *f;
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struct fifolog_writer *f;
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ALLOC(&f, sizeof *f);
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ALLOC_OBJ(f, FIFOLOG_WRITER_MAGIC);
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f->magic = FIFOLOG_WRITER_MAGIC;
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assert(f != NULL);
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return (f);
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return (f);
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}
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}
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@ -94,36 +96,11 @@ fifolog_write_close(struct fifolog_writer *f)
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CHECK_OBJ_NOTNULL(f, FIFOLOG_WRITER_MAGIC);
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CHECK_OBJ_NOTNULL(f, FIFOLOG_WRITER_MAGIC);
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fifolog_int_close(&f->ff);
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fifolog_int_close(&f->ff);
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free(f->ff);
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free(f->ff);
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if (f->ibuf != NULL)
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if (f->obuf != NULL)
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free(f->ibuf);
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free(f->obuf);
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free(f);
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free(f);
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}
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}
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static void
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fifo_prepobuf(struct fifolog_writer *f, time_t now, int flag)
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{
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memset(f->ff->recbuf, 0, f->ff->recsize);
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f->ff->zs->next_out = f->ff->recbuf + 5;
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f->ff->zs->avail_out = f->ff->recsize - 5;
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if (f->recno == 0 && f->seq == 0) {
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srandomdev();
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do {
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f->seq = random();
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} while (f->seq == 0);
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}
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be32enc(f->ff->recbuf, f->seq++);
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f->ff->recbuf[4] = f->flag;
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f->flag = 0;
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if (flag) {
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f->ff->recbuf[4] |= FIFOLOG_FLG_SYNC;
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be32enc(f->ff->recbuf + 5, (u_int)now);
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f->ff->zs->next_out += 4;
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f->ff->zs->avail_out -= 4;
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}
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fifolog_write_assert(f);
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}
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const char *
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const char *
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fifolog_write_open(struct fifolog_writer *f, const char *fn, unsigned writerate, unsigned syncrate, int compression)
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fifolog_write_open(struct fifolog_writer *f, const char *fn, unsigned writerate, unsigned syncrate, int compression)
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{
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{
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@ -164,144 +141,154 @@ fifolog_write_open(struct fifolog_writer *f, const char *fn, unsigned writerate,
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f->seq++;
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f->seq++;
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}
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}
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f->ibufsize = 32768;
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f->obufsize = f->ff->recsize;
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ALLOC(&f->ibuf, f->ibufsize);
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ALLOC(&f->obuf, f->obufsize);
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f->iptr = f->ibuf;
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f->ff->zs->next_in = f->iptr;
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i = deflateInit(f->ff->zs, (int)f->compression);
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i = deflateInit(f->ff->zs, (int)f->compression);
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assert(i == Z_OK);
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assert(i == Z_OK);
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f->flag |= FIFOLOG_FLG_RESTART;
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f->flag |= FIFOLOG_FLG_RESTART;
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f->flag |= FIFOLOG_FLG_SYNC;
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f->ff->zs->next_out = f->obuf + 9;
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f->ff->zs->avail_out = f->obufsize - 9;
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time(&now);
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time(&now);
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fifo_prepobuf(f, now, 1);
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f->starttime = now;
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f->starttime = now;
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f->lastsync = now;
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f->lastwrite = now;
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fifolog_write_assert(f);
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fifolog_write_assert(f);
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return (NULL);
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return (NULL);
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}
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}
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static void
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static int
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fifo_writerec(struct fifolog_writer *f)
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fifolog_write_output(struct fifolog_writer *f, int fl, time_t now)
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{
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{
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int i;
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long h, l = f->ff->zs->next_out - f->obuf;
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time_t t;
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int i, w;
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fifolog_write_assert(f);
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h = 4; /* seq */
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f->writes_since_sync++;
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be32enc(f->obuf, f->seq);
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f->obuf[h] = f->flag;
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assert(f->recno < f->ff->logsize);
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h += 1; /* flag */
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f->cnt[FIFOLOG_PT_BYTES_POST] += f->ff->recsize - f->ff->zs->avail_out;
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if (f->flag & FIFOLOG_FLG_SYNC) {
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if (f->ff->zs->avail_out == 0) {
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be32enc(f->obuf + h, now);
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/* nothing */
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h += 4; /* timestamp */
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} else if (f->ff->zs->avail_out <= 255) {
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f->ff->recbuf[f->ff->recsize - 1] =
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(u_char)f->ff->zs->avail_out;
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f->ff->recbuf[4] |= FIFOLOG_FLG_1BYTE;
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} else {
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be32enc(f->ff->recbuf + f->ff->recsize - 4,
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f->ff->zs->avail_out);
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f->ff->recbuf[4] |= FIFOLOG_FLG_4BYTE;
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}
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}
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i = pwrite(f->ff->fd, f->ff->recbuf, f->ff->recsize,
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(f->recno + 1) * f->ff->recsize);
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assert(l <= (long)f->ff->recsize);
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assert (i == (int)f->ff->recsize);
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assert(l >= h);
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if (++f->recno == f->ff->logsize)
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if (l == h)
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f->recno = 0;
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return (0);
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if (h + l < (long)f->ff->recsize && fl == Z_NO_FLUSH)
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return (0);
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w = f->ff->recsize - l;
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if (w > 255) {
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be32enc(f->obuf + f->ff->recsize - 4, w);
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f->obuf[4] |= FIFOLOG_FLG_4BYTE;
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} else if (w > 0) {
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f->obuf[f->ff->recsize - 1] = w;
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f->obuf[4] |= FIFOLOG_FLG_1BYTE;
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}
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f->cnt[FIFOLOG_PT_BYTES_POST] += w;
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#ifdef DBG
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fprintf(stderr, "W: fl=%d h=%ld l=%ld w=%d recno=%jd fx %02x\n",
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fl, h, l, w, f->recno, f->obuf[4]);
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#endif
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i = pwrite(f->ff->fd, f->obuf, f->ff->recsize,
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(f->recno + 1) * f->ff->recsize);
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assert(i == (int)f->ff->recsize);
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f->cnt[FIFOLOG_PT_WRITES]++;
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f->cnt[FIFOLOG_PT_WRITES]++;
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time(&t);
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f->cnt[FIFOLOG_PT_RUNTIME] = t - f->starttime; /*lint !e776 */
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f->lastwrite = now;
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fifolog_write_assert(f);
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f->seq++;
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f->recno++;
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#ifdef DBG
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if (f->flag)
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fprintf(stderr, "SYNC- %d\n", __LINE__);
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#endif
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f->flag = 0;
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memset(f->obuf, 0, f->obufsize);
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f->ff->zs->next_out = f->obuf + 5;
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f->ff->zs->avail_out = f->obufsize - 5;
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return (1);
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}
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static void
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fifolog_write_gzip(struct fifolog_writer *f, const void *p, int len, time_t now, int fin)
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{
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int i, fl;
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f->cnt[FIFOLOG_PT_BYTES_PRE] += len;
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if (fin == 0)
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fl = Z_NO_FLUSH;
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else if (f->cleanup || now >= (int)(f->lastsync + f->syncrate)) {
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f->cleanup = 0;
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fl = Z_FINISH;
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f->cnt[FIFOLOG_PT_SYNC]++;
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} else if (now >= (int)(f->lastwrite + f->writerate)) {
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fl = Z_SYNC_FLUSH;
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f->cnt[FIFOLOG_PT_FLUSH]++;
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} else if (p == NULL)
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return;
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else
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fl = Z_NO_FLUSH;
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f->ff->zs->avail_in = len;
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f->ff->zs->next_in = (void*)(uintptr_t)p;
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#ifdef DBG
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if (fl != Z_NO_FLUSH)
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fprintf(stderr, "Z len %3d fin %d now %ld fl %d ai %u ao %u\n",
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len, fin, now, fl,
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f->ff->zs->avail_in,
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f->ff->zs->avail_out);
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#endif
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while (1) {
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i = deflate(f->ff->zs, fl);
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#ifdef DBG
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if (i || f->ff->zs->avail_in)
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fprintf(stderr, "fl = %d, i = %d ai = %u ao = %u fx=%02x\n", fl, i,
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f->ff->zs->avail_in,
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f->ff->zs->avail_out, f->flag);
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#endif
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assert(i == Z_OK || i == Z_BUF_ERROR || i == Z_STREAM_END);
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assert(f->ff->zs->avail_in == 0);
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if (!fifolog_write_output(f, fl, now))
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break;
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}
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assert(f->ff->zs->avail_in == 0);
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if (fl == Z_FINISH) {
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f->flag |= FIFOLOG_FLG_SYNC;
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f->ff->zs->next_out = f->obuf + 9;
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f->ff->zs->avail_out = f->obufsize - 9;
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f->lastsync = now;
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#ifdef DBG
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fprintf(stderr, "SYNC %d\n", __LINE__);
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#endif
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assert(Z_OK == deflateReset(f->ff->zs));
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}
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}
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}
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int
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int
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fifolog_write_poll(struct fifolog_writer *f, time_t now)
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fifolog_write_poll(struct fifolog_writer *f, time_t now)
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{
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{
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int i, fl, bo, bf;
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if (now == 0)
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if (now == 0)
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time(&now);
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time(&now);
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fifolog_write_gzip(f, NULL, 0, now, 1);
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fifolog_write_assert(f);
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return (0);
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if (f->cleanup || now >= (int)(f->lastsync + f->syncrate)) {
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/*
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* We always check the sync timer, otherwise a flood of data
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* would not get any sync records at all
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*/
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f->cleanup = 0;
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fl = Z_FINISH;
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f->lastsync = now;
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f->lastwrite = now;
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f->cnt[FIFOLOG_PT_SYNC]++;
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} else if (f->ff->zs->avail_in == 0 &&
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now >= (int)(f->lastwrite + f->writerate)) {
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/*
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* We only check for writerate timeouts when the input
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* buffer is empty. It would be silly to force a write if
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* pending input could cause it to happen on its own.
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*/
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fl = Z_SYNC_FLUSH;
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f->lastwrite = now;
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f->cnt[FIFOLOG_PT_FLUSH]++;
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} else if (f->ff->zs->avail_in == 0)
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return (0); /* nothing to do */
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else
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fl = Z_NO_FLUSH;
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for (;;) {
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assert(f->ff->zs->avail_out > 0);
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bf = f->ff->zs->avail_out;
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i = deflate(f->ff->zs, fl);
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assert (i == Z_OK || i == Z_BUF_ERROR || i == Z_STREAM_END);
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bo = f->ff->zs->avail_out;
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/* If we have output space and not in a hurry.. */
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if (bo > 0 && fl == Z_NO_FLUSH)
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break;
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/* Write output buffer, if anything in it */
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if (bo != bf)
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fifo_writerec(f);
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/* If the buffer were full, we need to check again */
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if (bo == 0) {
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fifo_prepobuf(f, now, 0);
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continue;
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}
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if (fl == Z_FINISH) {
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/* Make next record a SYNC record */
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fifo_prepobuf(f, now, 1);
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/* And reset the zlib engine */
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i = deflateReset(f->ff->zs);
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assert(i == Z_OK);
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f->writes_since_sync = 0;
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} else {
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fifo_prepobuf(f, now, 0);
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}
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break;
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}
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if (f->ff->zs->avail_in == 0) {
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/* Reset input buffer when empty */
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f->iptr = f->ibuf;
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f->ff->zs->next_in = f->iptr;
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}
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fifolog_write_assert(f);
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return (1);
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}
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static void
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fifolog_acct(struct fifolog_writer *f, unsigned bytes)
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{
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f->ff->zs->avail_in += bytes;
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f->iptr += bytes;
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f->cnt[FIFOLOG_PT_BYTES_PRE] += bytes;
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}
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}
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/*
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/*
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@ -312,8 +299,8 @@ fifolog_acct(struct fifolog_writer *f, unsigned bytes)
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int
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int
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fifolog_write_bytes(struct fifolog_writer *f, uint32_t id, time_t now, const void *ptr, unsigned len)
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fifolog_write_bytes(struct fifolog_writer *f, uint32_t id, time_t now, const void *ptr, unsigned len)
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{
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{
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u_int l;
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const unsigned char *p;
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const unsigned char *p;
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||||||
|
uint8_t buf[4];
|
||||||
|
|
||||||
fifolog_write_assert(f);
|
fifolog_write_assert(f);
|
||||||
assert(!(id & (FIFOLOG_TIMESTAMP|FIFOLOG_LENGTH)));
|
assert(!(id & (FIFOLOG_TIMESTAMP|FIFOLOG_LENGTH)));
|
||||||
@ -322,46 +309,45 @@ fifolog_write_bytes(struct fifolog_writer *f, uint32_t id, time_t now, const voi
|
|||||||
p = ptr;
|
p = ptr;
|
||||||
if (len == 0) {
|
if (len == 0) {
|
||||||
len = strlen(ptr) + 1;
|
len = strlen(ptr) + 1;
|
||||||
l = 4 + len; /* id */
|
|
||||||
} else {
|
} else {
|
||||||
assert(len <= 255);
|
assert(len <= 255);
|
||||||
id |= FIFOLOG_LENGTH;
|
id |= FIFOLOG_LENGTH;
|
||||||
l = 5 + len; /* id + len */
|
|
||||||
}
|
}
|
||||||
|
|
||||||
l += 4; /* A timestamp may be necessary */
|
|
||||||
|
|
||||||
/* Now do timestamp, if needed */
|
/* Now do timestamp, if needed */
|
||||||
if (now == 0)
|
if (now == 0)
|
||||||
time(&now);
|
time(&now);
|
||||||
|
|
||||||
assert(l < f->ibufsize);
|
|
||||||
|
|
||||||
/* Return if there is not enough space */
|
|
||||||
if (f->iptr + l > f->ibuf + f->ibufsize)
|
|
||||||
return (0);
|
|
||||||
|
|
||||||
if (now != f->last) {
|
if (now != f->last) {
|
||||||
id |= FIFOLOG_TIMESTAMP;
|
id |= FIFOLOG_TIMESTAMP;
|
||||||
f->last = now;
|
f->last = now;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Emit instance+flag and length */
|
/* Emit instance+flag */
|
||||||
be32enc(f->iptr, id);
|
be32enc(buf, id);
|
||||||
fifolog_acct(f, 4);
|
fifolog_write_gzip(f, buf, 4, now, 0);
|
||||||
|
|
||||||
if (id & FIFOLOG_TIMESTAMP) {
|
if (id & FIFOLOG_TIMESTAMP) {
|
||||||
be32enc(f->iptr, (uint32_t)f->last);
|
be32enc(buf, (uint32_t)f->last);
|
||||||
fifolog_acct(f, 4);
|
fifolog_write_gzip(f, buf, 4, now, 0);
|
||||||
}
|
}
|
||||||
if (id & FIFOLOG_LENGTH) {
|
if (id & FIFOLOG_LENGTH) {
|
||||||
f->iptr[0] = (u_char)len;
|
buf[0] = (u_char)len;
|
||||||
fifolog_acct(f, 1);
|
fifolog_write_gzip(f, buf, 1, now, 0);
|
||||||
}
|
}
|
||||||
|
|
||||||
assert (len > 0);
|
assert (len > 0);
|
||||||
memcpy(f->iptr, p, len);
|
#if 1
|
||||||
fifolog_acct(f, len);
|
if (len > f->ibufsize) {
|
||||||
|
free(f->ibuf);
|
||||||
|
f->ibufsize = len;
|
||||||
|
ALLOC(&f->ibuf, f->ibufsize);
|
||||||
|
}
|
||||||
|
memcpy(f->ibuf, p, len);
|
||||||
|
fifolog_write_gzip(f, f->ibuf, len, now, 1);
|
||||||
|
#else
|
||||||
|
fifolog_write_gzip(f, p, len, now, 1);
|
||||||
|
#endif
|
||||||
fifolog_write_assert(f);
|
fifolog_write_assert(f);
|
||||||
return (1);
|
return (1);
|
||||||
}
|
}
|
||||||
@ -384,7 +370,6 @@ fifolog_write_bytes_poll(struct fifolog_writer *f, uint32_t id, time_t now, cons
|
|||||||
|
|
||||||
if (len == 0) {
|
if (len == 0) {
|
||||||
while (!fifolog_write_bytes(f, id, now, ptr, len)) {
|
while (!fifolog_write_bytes(f, id, now, ptr, len)) {
|
||||||
(void)fifolog_write_poll(f, now);
|
|
||||||
(void)usleep(10000);
|
(void)usleep(10000);
|
||||||
}
|
}
|
||||||
} else {
|
} else {
|
||||||
@ -394,7 +379,6 @@ fifolog_write_bytes_poll(struct fifolog_writer *f, uint32_t id, time_t now, cons
|
|||||||
if (l > 255)
|
if (l > 255)
|
||||||
l = 255;
|
l = 255;
|
||||||
while (!fifolog_write_bytes(f, id, now, p, l)) {
|
while (!fifolog_write_bytes(f, id, now, p, l)) {
|
||||||
(void)fifolog_write_poll(f, now);
|
|
||||||
(void)usleep(10000);
|
(void)usleep(10000);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
Loading…
Reference in New Issue
Block a user