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cygwin: implement uv_resident_set_memory (#4333)

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According to the documentation for Cygwin, the penultimate field
of /proc/pid/stat corresponds to the RSS, so the method is basically
the same as in the Linux version. The only difference is that getpagesize()
will return wincap.allocation_granularity(), but in this mapping, RSS is
calculated using wincap.page_size(), which can be accessed by sysinfo.mem_unit.
This commit is contained in:
Farzin Monsef 2024-03-02 13:54:57 +03:30 committed by GitHub
parent a7c44d6748
commit 625d3d275a
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1 changed files with 38 additions and 2 deletions
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40
src/unix/cygwin.c
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@ -36,9 +36,45 @@ int uv_uptime(double* uptime) {
}
int uv_resident_set_memory(size_t* rss) {
/* FIXME: read /proc/meminfo? */
*rss = 0;
char buf[1024];
const char* s;
long val;
int rc;
int i;
struct sysinfo si;
/* rss: 24th element */
rc = uv__slurp("/proc/self/stat", buf, sizeof(buf));
if (rc < 0)
return rc;
/* find the last ')' */
s = strrchr(buf, ')');
if (s == NULL)
goto err;
for (i = 1; i <= 22; i++) {
s = strchr(s + 1, ' ');
if (s == NULL)
goto err;
}
errno = 0;
val = strtol(s, NULL, 10);
if (val < 0 || errno != 0)
goto err;
do
rc = sysinfo(&si);
while (rc == -1 && errno == EINTR);
if (rc == -1)
return UV__ERR(errno);
*rss = val * si.mem_unit;
return 0;
err:
return UV_EINVAL;
}
int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {