More robust platform definition support.

The idea is that someday it will be possible to just concatenate the entire
set of source files into a single giant source file, for systems that
want to work this way.  As a result, the build system now compiles every
file, although some of them will not have any definitions.

1 files changed, 0 insertions, 149 deletions

diff --git a/src/platform/posix/posix_clock.h b/src/platform/posix/posix_clock.h
deleted file mode 100644
index 07fc603d..00000000
--- a/src/platform/posix/posix_clock.h
+++ /dev/null
@@ -1,149 +0,0 @@
-/*
- * Copyright 2016 Garrett D'Amore <garrett@damore.org>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom
- * the Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-/*
- * This is more of a direct #include of a .c rather than .h file.
- * But having it be a .h makes compiler rules work out properly.  Do
- * not include this more than once into your program, or you will
- * get multiple symbols defined.
- */
-
-/*
- * POSIX clock stuff.
- */
-
-#include <time.h>
-#include <errno.h>
-#include <string.h>
-
-#ifndef	NNG_USE_GETTIMEOFDAY
-
-/*
- * Use POSIX realtime stuff.
- */
-
-uint64_t
-nni_clock(void)
-{
-	struct timespec	ts;
-	uint64_t	usec;
-
-	if (clock_gettime(NNG_USE_CLOCKID, &ts) != 0) {
-		/* This should never ever occur. */
-		nni_panic("clock_gettime failed: %s", strerror(errno));
-	}
-
-	usec = ts.tv_sec;
-	usec *= 1000000;
-	usec += (ts.tv_nsec / 1000);
-	return (usec);
-}
-
-
-void
-nni_usleep(uint64_t usec)
-{
-	struct timespec ts;
-
-	ts.tv_sec = usec / 1000000;
-	ts.tv_nsec = (usec % 1000000) * 1000;
-
-	/* Do this in a loop, so that interrupts don't actually wake us. */
-	while (ts.tv_sec || ts.tv_nsec) {
-		(void) nanosleep(&ts, &ts);
-	}
-}
-
-#else	/* NNG_USE_GETTIMEOFDAY */
-
-/*
- * If you're here, its because you don't have a modern clock_gettime with
- * monotonic clocks, or the necessary pthread_condattr_settclock().  In
- * this case, you should be advised that *bad* things can happen if your
- * system clock changes time while programs using this library are running.
- * (Basically, timeouts can take longer or shorter, leading to either hangs
- * or apparent spurious errors.  Eventually it should all sort itself out,
- * but if you change the clock by a large amount you might wonder what the
- * heck is happening until it does.)
- */
-
-#include <pthread.h>
-#include <sys/time.h>
-
-uint64_t
-nni_clock(void)
-{
-	uint64_t usec;
-
-	struct timeval tv;
-	if (gettimeofday(&tv, NULL) != 0) {
-		nni_panic("gettimeofday failed: %s", strerror(errno));
-	}
-
-	usec = tv.tv_sec;
-	usec *= 1000000;
-	usec += tv.tv_usec;
-	return (usec);
-}
-
-void
-nni_usleep(uint64_t usec)
-{
-	/*
-	 * So probably there is no nanosleep.  We could in theory use
-	 * pthread condition variables, but that means doing memory
-	 * allocation, or forcing the use of pthreads where the platform
-	 * might be preferring the use of another threading package.
-	 * Additionally, use of pthreads means that we cannot use
-	 * relative times in a clock_settime safe manner.
-	 * So we can use poll() instead, which is rather coarse, but
-	 * pretty much guaranteed to work.
-	 */
-	struct pollfd pfd;
-	uint64_t now;
-	uint64_t expire;
-
-	/*
-	 * Possibly we could pass NULL instead of pfd, but passing a valid
-	 * pointer ensures that if the system dereferences the pointer it
-	 * won't come back with EFAULT.
-	 */
-	pfd.fd = -1;
-	pfd.events = 0;
-
- 	now = nni_clock();
-	expire = now + usec;
-
-	while (now < expire) {
-		/*
-		 * In theory we could round up to a whole number of msec,
-		 * but under the covers poll already does some rounding up,
-		 * and the loop above guarantees that we will not bail out
-		 * early.  So this gives us a better chance to avoid adding
-		 * nearly an extra unneeded millisecond to the wait.
-		 */
-		(void) poll(&pfd, 0, (int)((expire - now) / 1000));
- 		now = nni_clock();
-	}
-}
-
-#endif	/* NNG_USE_GETTIMEOFDAY */