| 1 | /* Deep copy of a pthread_attr_t object. |
|---|---|
| 2 | Copyright (C) 2020-2022 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <errno.h> |
| 20 | #include <pthreadP.h> |
| 21 | #include <stdlib.h> |
| 22 | |
| 23 | int |
| 24 | __pthread_attr_copy (pthread_attr_t *target, const pthread_attr_t *source) |
| 25 | { |
| 26 | /* Avoid overwriting *TARGET until all allocations have |
| 27 | succeeded. */ |
| 28 | union pthread_attr_transparent temp; |
| 29 | temp.external = *source; |
| 30 | |
| 31 | /* Force new allocation. This function has full ownership of temp. */ |
| 32 | temp.internal.extension = NULL; |
| 33 | |
| 34 | int ret = 0; |
| 35 | |
| 36 | struct pthread_attr *isource = (struct pthread_attr *) source; |
| 37 | |
| 38 | if (isource->extension != NULL) |
| 39 | { |
| 40 | /* Propagate affinity mask information. */ |
| 41 | if (isource->extension->cpusetsize > 0) |
| 42 | ret = __pthread_attr_setaffinity_np (&temp.external, |
| 43 | isource->extension->cpusetsize, |
| 44 | isource->extension->cpuset); |
| 45 | |
| 46 | /* Propagate the signal mask information. */ |
| 47 | if (ret == 0 && isource->extension->sigmask_set) |
| 48 | ret = __pthread_attr_setsigmask_internal ((pthread_attr_t *) &temp, |
| 49 | &isource->extension->sigmask); |
| 50 | } |
| 51 | |
| 52 | if (ret != 0) |
| 53 | { |
| 54 | /* Deallocate because we have ownership. */ |
| 55 | __pthread_attr_destroy (&temp.external); |
| 56 | return ret; |
| 57 | } |
| 58 | |
| 59 | /* Transfer ownership. *target is not assumed to have been |
| 60 | initialized. */ |
| 61 | *target = temp.external; |
| 62 | return 0; |
| 63 | } |
| 64 | libc_hidden_def (__pthread_attr_copy) |
| 65 |