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| author | Lukas Larsson <[email protected]> | 2014-11-03 11:32:01 +0100 |
|---|---|---|
| committer | Björn-Egil Dahlberg <[email protected]> | 2015-04-13 15:59:22 +0200 |
| commit | e6d3da55a2fe06730f3b92098ff8c13e16e3254b (patch) | |
| tree | 68f8ced6767f0b0f69514ea57c1d4805455f836f /erts/emulator/sys/common/erl_poll.h | |
| parent | 6e3e48d39a77aa18b92fb048d6a910baa71badf3 (diff) | |
| download | otp-e6d3da55a2fe06730f3b92098ff8c13e16e3254b.tar.gz otp-e6d3da55a2fe06730f3b92098ff8c13e16e3254b.tar.bz2 otp-e6d3da55a2fe06730f3b92098ff8c13e16e3254b.zip | |
erts: Add high accuracy poll timeouts
Different poll/select implementations have different ways
to handle timeouts of < ms accuracy. Most have extended
API like pselect or such, while others rely on using
timerfds (epoll_wait). If no high accuracy timeout is
available, we simply round up to nearest ms. If we do not
roundup we will spin the last ms when waiting for a timeout
which is not desirable.
Diffstat (limited to 'erts/emulator/sys/common/erl_poll.h')
| -rw-r--r-- | erts/emulator/sys/common/erl_poll.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/erts/emulator/sys/common/erl_poll.h b/erts/emulator/sys/common/erl_poll.h index d02ed2396b..ae2d063805 100644 --- a/erts/emulator/sys/common/erl_poll.h +++ b/erts/emulator/sys/common/erl_poll.h @@ -98,6 +98,8 @@ # endif #endif +#define ERTS_POLL_USE_TIMERFD 0 + typedef Uint32 ErtsPollEvents; #undef ERTS_POLL_EV_E2N @@ -130,6 +132,12 @@ struct erts_sys_fd_type { #include <sys/epoll.h> +#ifdef HAVE_SYS_TIMERFD_H +#include <sys/timerfd.h> +#undef ERTS_POLL_USE_TIMERFD +#define ERTS_POLL_USE_TIMERFD 1 +#endif + #define ERTS_POLL_EV_E2N(EV) \ ((__uint32_t) (EV)) #define ERTS_POLL_EV_N2E(EV) \ |