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Changed semantics of stream, more IO limiting code.

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This commit is contained in:
Michael Jumper
2010-09-11 01:02:15 -07:00
parent a1124923f2
commit e05a2e5f79
3 changed files with 35 additions and 39 deletions
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30
guacamole/proxy/guacio.c
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@@ -65,11 +65,6 @@ void guac_close(GUACIO* io) {
ssize_t __guac_write(GUACIO* io, const char* buf, int count) {
struct timeval start, end;
suseconds_t elapsed;
suseconds_t required_usecs;
struct timespec required_sleep;
int retval;
/* Write and time how long the write takes (microseconds) */
@@ -82,18 +77,27 @@ ssize_t __guac_write(GUACIO* io, const char* buf, int count) {
if (io->transfer_limit > 0) {
suseconds_t elapsed;
suseconds_t required_usecs;
/* Get elapsed time */
elapsed = (end.tv_sec - start.tv_sec) * 1000000 + end.tv_usec - start.tv_usec;
/* Sleep as necessary */
required_usecs = retval * 1000 / io->transfer_limit; /* useconds at 128 k/s*/
required_sleep.tv_sec = required_usecs / 1000000;
required_sleep.tv_nsec = (required_usecs % 1000000) * 1000;
nanosleep(&required_sleep, NULL);
/* Calculate how much time we must sleep */
required_usecs = retval * 1000 / io->transfer_limit - elapsed; /* useconds at transfer_limit KB/s*/
/* Sleep as necessary */
if (required_usecs > 0) {
struct timespec required_sleep;
required_sleep.tv_sec = required_usecs / 1000000;
required_sleep.tv_nsec = (required_usecs % 1000000) * 1000;
nanosleep(&required_sleep, NULL);
}
/* Get new elapsed time */
gettimeofday(&end, NULL);
elapsed = (end.tv_sec - start.tv_sec) * 1000000 + end.tv_usec - start.tv_usec;
}
return retval;