Commit b564e7ca59818e4904fc421fc8b1914cefd79538 | zig

author	Andrew Kelley <andrew@ziglang.org> 2019-09-05 15:09:13-04:00
committer	Andrew Kelley <andrew@ziglang.org> 2019-09-05 15:09:13-04:00
log	b564e7ca59818e4904fc421fc8b1914cefd79538
tree	fbbc0d1380bb77c8a6ac8f28570f4d4f076ab13b
parent	2045b4d93240cd95eee7143f2cfc360eb63c5802
signature	Commit is signed but in an unrecognized format.

Do a binary search for the maximum RLIMIT_NOFILE.

Patch lifted from node.js commit
6820054d2d42ff9274ea0755bea59cfc4f26f353

1 files changed, 24 insertions(+), 0 deletions(-)

src/os.cpp+24

...	...	@@ -45,6 +45,7 @@ typedef SSIZE_T ssize_t;
45	45	#include <sys/types.h>
46	46	#include <sys/stat.h>
47	47	#include <sys/wait.h>
	48	#include <sys/resource.h>
48	49	#include <fcntl.h>
49	50	#include <limits.h>
50	51	#include <spawn.h>
...	...	@@ -1374,6 +1375,29 @@ int os_init(void) {
1374	1375	#elif defined(__MACH__)
1375	1376	host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &macos_monotonic_clock);
1376	1377	host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &macos_calendar_clock);
	1378	#endif
	1379	#if defined(ZIG_OS_POSIX)
	1380	// Raise the open file descriptor limit.
	1381	// Code lifted from node.js
	1382	struct rlimit lim;
	1383	if (getrlimit(RLIMIT_NOFILE, &lim) == 0 && lim.rlim_cur != lim.rlim_max) {
	1384	// Do a binary search for the limit.
	1385	rlim_t min = lim.rlim_cur;
	1386	rlim_t max = 1 << 20;
	1387	// But if there's a defined upper bound, don't search, just set it.
	1388	if (lim.rlim_max != RLIM_INFINITY) {
	1389	min = lim.rlim_max;
	1390	max = lim.rlim_max;
	1391	}
	1392	do {
	1393	lim.rlim_cur = min + (max - min) / 2;
	1394	if (setrlimit(RLIMIT_NOFILE, &lim)) {
	1395	max = lim.rlim_cur;
	1396	} else {
	1397	min = lim.rlim_cur;
	1398	}
	1399	} while (min + 1 < max);
	1400	}
1377	1401	#endif
1378	1402	return 0;
1379	1403	}