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nptl: Make pthread_attr_t dynamically extensible

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This introduces the function __pthread_attr_extension to allocate the
extension space, which is freed by pthread_attr_destroy.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Florian Weimer
2020-06-02 10:33:30 +02:00
parent 6993670b52
commit 7538d46113
10 changed files with 98 additions and 33 deletions
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23
nptl/pthread_attr_setaffinity.c
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@ -34,23 +34,30 @@ __pthread_attr_setaffinity_np (pthread_attr_t *attr, size_t cpusetsize,
if (cpuset == NULL || cpusetsize == 0)
{
free (iattr->cpuset);
iattr->cpuset = NULL;
iattr->cpusetsize = 0;
if (iattr->extension != NULL)
{
free (iattr->extension->cpuset);
iattr->extension->cpuset = NULL;
iattr->extension->cpusetsize = 0;
}
}
else
{
if (iattr->cpusetsize != cpusetsize)
int ret = __pthread_attr_extension (iattr);
if (ret != 0)
return ret;
if (iattr->extension->cpusetsize != cpusetsize)
{
void *newp = (cpu_set_t *) realloc (iattr->cpuset, cpusetsize);
void *newp = realloc (iattr->extension->cpuset, cpusetsize);
if (newp == NULL)
return ENOMEM;
iattr->cpuset = newp;
iattr->cpusetsize = cpusetsize;
iattr->extension->cpuset = newp;
iattr->extension->cpusetsize = cpusetsize;
}
memcpy (iattr->cpuset, cpuset, cpusetsize);
memcpy (iattr->extension->cpuset, cpuset, cpusetsize);
}
return 0;