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Convert ticks to 64-bit, added nanosecond precision to the API

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Fixes https://github.com/libsdl-org/SDL/issues/5512
Fixes https://github.com/libsdl-org/SDL/issues/6731
This commit is contained in:
Sam Lantinga
2022-12-02 01:17:17 -08:00
parent 764b899a13
commit 8121bbd083
96 changed files with 938 additions and 1243 deletions
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17
src/core/unix/SDL_poll.c
View File

@@ -32,7 +32,7 @@
#endif
#include <errno.h>
int SDL_IOReady(int fd, int flags, int timeoutMS)
int SDL_IOReady(int fd, int flags, Sint64 timeoutNS)
{
int result;
@@ -42,6 +42,7 @@ int SDL_IOReady(int fd, int flags, int timeoutMS)
do {
#ifdef HAVE_POLL
struct pollfd info;
int timeoutMS;
info.fd = fd;
info.events = 0;
@@ -51,6 +52,14 @@ int SDL_IOReady(int fd, int flags, int timeoutMS)
if (flags & SDL_IOR_WRITE) {
info.events |= POLLOUT;
}
/* FIXME: Add support for ppoll() for nanosecond precision */
if (timeoutNS > 0) {
timeoutMS = (int)SDL_NS_TO_MS(timeoutNS);
} else if (timeoutNS == 0) {
timeoutMS = 0;
} else {
timeoutMS = -1;
}
result = poll(&info, 1, timeoutMS);
#else
fd_set rfdset, *rfdp = NULL;
@@ -71,9 +80,9 @@ int SDL_IOReady(int fd, int flags, int timeoutMS)
wfdp = &wfdset;
}
if (timeoutMS >= 0) {
tv.tv_sec = timeoutMS / 1000;
tv.tv_usec = (timeoutMS % 1000) * 1000;
if (timeoutNS >= 0) {
tv.tv_sec = (timeoutNS / SDL_NS_PER_SECOND);
tv.tv_usec = SDL_NS_TO_US(timeoutNS % SDL_NS_PER_SECOND);
tvp = &tv;
}

2
src/core/unix/SDL_poll.h
View File

@@ -28,7 +28,7 @@
#define SDL_IOR_WRITE 0x2
#define SDL_IOR_NO_RETRY 0x4
extern int SDL_IOReady(int fd, int flags, int timeoutMS);
extern int SDL_IOReady(int fd, int flags, Sint64 timeoutNS);
#endif /* SDL_poll_h_ */