880be6a940
See https://github.com/graydon/rust/wiki/Logging-vision The runtime logging categories are now treated in the same way as modules in compiled code. Each domain now has a log_lvl that can be used to restrict the logging from that domain (will be used to allow logging to be restricted to a single domain). Features dropped (can be brought back to life if there is interest): - Logger indentation - Multiple categories per log statement - I possibly broke some of the color code -- it confuses me
89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
#include "rust_internal.h"
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#include "valgrind.h"
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// The mechanism in this file is very crude; every domain (thread) spawns its
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// own secondary timer thread, and that timer thread *never idles*. It
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// sleep-loops interrupting the domain.
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//
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// This will need replacement, particularly in order to achieve an actual
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// state of idling when we're waiting on the outside world. Though that might
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// be as simple as making a secondary waitable start/stop-timer signalling
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// system between the domain and its timer thread. We'll see.
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//
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// On the other hand, we don't presently have the ability to idle domains *at
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// all*, and without the timer thread we're unable to otherwise preempt rust
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// tasks. So ... one step at a time.
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//
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// The implementation here is "lockless" in the sense that it only involves
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// one-directional signaling of one-shot events, so the event initiator just
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// writes a nonzero word to a prederermined location and waits for the
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// receiver to see it show up in their memory.
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#if defined(__WIN32__)
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static DWORD WINAPI
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#elif defined(__GNUC__)
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static void *
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#else
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#error "Platform not supported"
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#endif
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timer_loop(void *ptr) {
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// We were handed the rust_timer that owns us.
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rust_timer *timer = (rust_timer *)ptr;
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rust_dom *dom = timer->dom;
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DLOG(dom, timer, "in timer 0x%" PRIxPTR, (uintptr_t)timer);
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size_t ms = TIME_SLICE_IN_MS;
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while (!timer->exit_flag) {
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#if defined(__WIN32__)
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Sleep(ms);
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#else
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usleep(ms * 1000);
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#endif
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DLOG(dom, timer, "timer 0x%" PRIxPTR
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" interrupting domain 0x%" PRIxPTR, (uintptr_t) timer,
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(uintptr_t) dom);
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dom->interrupt_flag = 1;
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}
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#if defined(__WIN32__)
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ExitThread(0);
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#else
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pthread_exit(NULL);
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#endif
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return 0;
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}
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rust_timer::rust_timer(rust_dom *dom) :
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dom(dom), exit_flag(0) {
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DLOG(dom, timer, "creating timer for domain 0x%" PRIxPTR, dom);
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#if defined(__WIN32__)
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thread = CreateThread(NULL, 0, timer_loop, this, 0, NULL);
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dom->win32_require("CreateThread", thread != NULL);
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if (RUNNING_ON_VALGRIND)
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Sleep(10);
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#else
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pthread_attr_init(&attr);
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pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
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pthread_create(&thread, &attr, timer_loop, (void *)this);
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#endif
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}
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rust_timer::~rust_timer() {
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exit_flag = 1;
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#if defined(__WIN32__)
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dom->win32_require("WaitForSingleObject",
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WaitForSingleObject(thread, INFINITE) == WAIT_OBJECT_0);
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#else
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pthread_join(thread, NULL);
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#endif
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}
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//
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// Local Variables:
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// mode: C++
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// compile-command: "make -k -C .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
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// End:
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//
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