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ffi/pthread: fix pthread_attr_t and PTHREAD_CREATE_DETACHED declarations #1958

Merged
merged 1 commit into from
Oct 5, 2024
Merged

ffi/pthread: fix pthread_attr_t and PTHREAD_CREATE_DETACHED declarations #1958

merged 1 commit into from
Oct 5, 2024

Commits on Oct 5, 2024

  1. ffi/pthread: fix pthread_attr_t and PTHREAD_CREATE_DETACHED decla… 

    …rations

The declarations of `pthread_attr_t` and `PTHREAD_CREATE_DETACHED` depend on the arch / OS:

| Target machine                  | `sizeof (pthread_attr_t)` | `PTHREAD_CREATE_DETACHED` |
|---------------------------------|--------------------------:|--------------------------:|
| aarch64-linux-gnu-g++           |                        64 |                         1 |
| aarch64-unknown-linux-android21 |                        56 |                         1 |
| arm-kindlepw2-linux-gnueabi     |                        36 |                         1 |
| arm-linux-gnueabihf             |                        36 |                         1 |
| arm64-apple-darwin23.6.0        |                        64 |                         2 |
| armv7a-unknown-linux-android18  |                        24 |                         1 |
| i386-pc-linux-gnu               |                        36 |                         1 |
| i686-unknown-linux-android18    |                        24 |                         1 |
| x86_64-apple-darwin22.6.0       |                        64 |                         2 |
| x86_64-pc-linux-gnu             |                        56 |                         1 |

The following C++ compiler command can be used to print those values:

```bash
▸ g++ -x c++ -c -o /dev/null - <<\EOF
template <int val> struct PrintConst;
PrintConst<sizeof (pthread_attr_t)> sizeof_pthread_attr_t;
PrintConst<PTHREAD_CREATE_DETACHED> valueof_PTHREAD_CREATE_DETACHED;
EOF
<stdin>:3:37: error: aggregate ‘PrintConst<56> sizeof_pthread_attr_t’ has incomplete type and cannot be defined
<stdin>:4:37: error: aggregate ‘PrintConst<1> valueof_PTHREAD_CREATE_DETACHED’ has incomplete type and cannot be defined
```
    @benoit-pierre
    benoit-pierre committed Oct 5, 2024
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