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qa: libc: slow note handlers cant't break sleep

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This commit is contained in:
Giacomo Tesio 2017-08-16 00:37:39 +02:00
parent b9483decb0
commit ef6aa99b74
2 changed files with 84 additions and 0 deletions
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1
qa/lib/c/build.json
View File

@ -32,6 +32,7 @@
"rwakeup0.c",
"rwakeup1.c",
"sleep.c",
"sleep2.c",
"sqrt.c",
"sysfatal.c",
"va_copy.c",

83
qa/lib/c/sleep2.c Normal file
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@ -0,0 +1,83 @@
/*
* This file is part of Jehanne.
*
* Copyright (C) 2017 Giacomo Tesio <giacomo@tesio.it>
*
* Jehanne is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 of the License.
*
* Jehanne is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Jehanne. If not, see <http://www.gnu.org/licenses/>.
*/
#include <u.h>
#include <lib9.h>
/* Test sleep(2): notes during a sleep don't break it even if note
* handler takes a while
*/
int verbose = 0;
int
printFirst(void *v, char *s)
{
/* just not exit, please */
if(strcmp(s, "alarm") == 0){
if(verbose)
fprint(2, "%d: noted: %s at %lld\n", getpid(), s, nsec());
atnotify(printFirst, 0);
sleep(2000);
return 1;
}
return 0;
}
int
failOnSecond(void *v, char *s)
{
/* just not exit, please */
if(strcmp(s, "alarm") == 0){
print("FAIL: timedout\n");
exits("FAIL");
}
return 0;
}
void
main(void)
{
int64_t a2000, a500, tStart, tEnd;
if (!atnotify(printFirst, 1) || !atnotify(failOnSecond, 1)){
fprint(2, "%r\n");
exits("atnotify fails");
}
alarm(5000);
a2000 = nsec();
alarm(500);
a500 = nsec();
tStart = nsec();
sleep(1000);
tEnd = nsec();
if(verbose)
fprint(2, "%d: set alarm(2000)@%lld then alarm(500)@%lld; elapsed in sleep() %lld nanosecond\n", getpid(), a2000, a500, tEnd-tStart);
if((tEnd-tStart)/(1000 * 1000) > 500+2000+400 /* 400ms = acceptable error */){
print("FAIL: should sleep less\n");
exits("FAIL");
}
if((tEnd-tStart)/(1000 * 1000) < 500+2000-400 /* 400ms = acceptable error */){
print("FAIL: should sleep more\n");
exits("FAIL");
}
print("PASS\n");
exits("PASS");
}