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/GNU Fortran 10

8.2.22 _gfortran_caf_sync_all — All-image barrier

Description:

Synchronization of all images in the current team; the program only continues on a given image after this function has been called on all images of the current team. Additionally, it ensures that all pending data transfers of previous segment have completed.

Syntax:

void _gfortran_caf_sync_all (int *stat, char *errmsg, size_t errmsg_len)

Arguments:
stat intent(out) Stores the status STAT= and may be NULL.
errmsg intent(out) When an error occurs, this will be set to an error message; may be NULL.
errmsg_len intent(in) the buffer size of errmsg

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https://gcc.gnu.org/onlinedocs/gcc-10.2.0/gfortran/_005fgfortran_005fcaf_005fsync_005fall.html