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posix: Move FD_ZERO() and FD_SET() calls outside loops.

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Martin Ling 2015-05-07 09:41:02 +01:00 committed by Uwe Hermann
parent 27911925c1
commit 772c586133
1 changed files with 6 additions and 4 deletions
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10
serialport.c
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@ -787,11 +787,12 @@ SP_API enum sp_return sp_blocking_write(struct sp_port *port, const void *buf,
timeradd(&start, &delta, &end); timeradd(&start, &delta, &end);
} }
FD_ZERO(&fds);
FD_SET(port->fd, &fds);
/* Loop until we have written the requested number of bytes. */ /* Loop until we have written the requested number of bytes. */
while (bytes_written < count) { while (bytes_written < count) {
/* Wait until space is available. */ /* Wait until space is available. */
FD_ZERO(&fds);
FD_SET(port->fd, &fds);
if (timeout_ms) { if (timeout_ms) {
gettimeofday(&now, NULL); gettimeofday(&now, NULL);
if (timercmp(&now, &end, >)) { if (timercmp(&now, &end, >)) {
@ -1002,11 +1003,12 @@ SP_API enum sp_return sp_blocking_read(struct sp_port *port, void *buf,
timeradd(&start, &delta, &end); timeradd(&start, &delta, &end);
} }
FD_ZERO(&fds);
FD_SET(port->fd, &fds);
/* Loop until we have the requested number of bytes. */ /* Loop until we have the requested number of bytes. */
while (bytes_read < count) { while (bytes_read < count) {
/* Wait until data is available. */ /* Wait until data is available. */
FD_ZERO(&fds);
FD_SET(port->fd, &fds);
if (timeout_ms) { if (timeout_ms) {
gettimeofday(&now, NULL); gettimeofday(&now, NULL);
if (timercmp(&now, &end, >)) if (timercmp(&now, &end, >))