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Cygwin's libc's pthread implementation does not support setting pshared on mutexes and condition variables. Therefore Windows synchronisation primitives needed to be used directly. On MSYS2/UCRT64 fork and mmap are not available and Windows core functionality needs to be used. libgfortran/ChangeLog: * caf/shmem.c (_gfortran_caf_init): Cleanup thread helper after use. (_gfortran_caf_finalize): Same. (_gfortran_caf_register): Handle lock_t correctly on Windows. (GEN_OP): Prevent warnings on non-initialized. (_gfortran_caf_lock): Handle lock_t correctly on Windows. (_gfortran_caf_unlock): Same. (_gfortran_caf_random_init): Fix formatting. (_gfortran_caf_form_team): Add more images to counter_barrier. * caf/shmem/alloc.c: Use routines from thread_support. * caf/shmem/allocator.c (allocator_lock): Same. (allocator_unlock): Same. * caf/shmem/allocator.h: Same. * caf/shmem/collective_subroutine.c (get_collsub_buf): Same. * caf/shmem/collective_subroutine.h: Same. * caf/shmem/counter_barrier.c (lock_counter_barrier): Same. (unlock_counter_barrier): Same. (counter_barrier_init): Same. (counter_barrier_wait): Same. (change_internal_barrier_count): Same. (counter_barrier_add): Same. (counter_barrier_init_add): Only increase value w/o signaling. (counter_barrier_get_count): Use routines from thread_support. * caf/shmem/counter_barrier.h: Same. (counter_barrier_init_add): New routine. * caf/shmem/shared_memory.c: Use windows routines where applicable. (shared_memory_set_env): Same. (shared_memory_get_master): Same. (shared_memory_init): Same. (shared_memory_cleanup): Same. * caf/shmem/shared_memory.h: Use types from thread_support. * caf/shmem/supervisor.c: Use windows routines where applicable. (get_memory_size_from_envvar): Same. (ensure_shmem_initialization): Same. (supervisor_main_loop): Use windows process start on windows without fork(). * caf/shmem/supervisor.h: Use types from thread_support. * caf/shmem/sync.c (lock_table): Use routines from thread_support. (unlock_table): Same. (sync_init): Same. (sync_init_supervisor): Same. (sync_table): Same. (lock_event): Same. (unlock_event): Same. (event_post): Same. (event_wait): Same. * caf/shmem/sync.h: Use types from thread_support. * caf/shmem/teams_mgmt.c (update_teams_images): Use routines from thread_support. * caf/shmem/thread_support.c: Add synchronisation primitives for windows. (smax): Windows only: Max for size_t. (get_handle): Windows only: Get the windows handle for a given id or create a new one, if it does not exist. (get_mutex): Windows only: Shortcut for getting a windows mutex handle. (get_condvar): Windows only: Same, but for condition variable. (thread_support_init_supervisor): Windows only: Clear tracker of allocated handle ids. (caf_shmem_mutex_lock): Windows only: Implememtation of lock, (caf_shmem_mutex_trylock): Windows only: trylock, and (caf_shmem_mutex_unlock): Windows only: unlock for Windows. (bm_is_set): Windows only: Check a bit is set in a mask. (bm_clear_bit): Windows only: Clear a bit in a mask. (bm_set_mask): Windows only: Set all bits in a mask. (bm_is_none): Windows only: Check if all bits are cleared. (caf_shmem_cond_wait): Windows only: Condition variable implemenation fro wait, (caf_shmem_cond_broadcast): Windows only: broadcast, and (caf_shmem_cond_signal): Windows only: signal on Windows. (caf_shmem_cond_update_count): Windows only: Need to know the images participating in a condition variable. (thread_support_cleanup): Windows only: Clean up the handles on exit. * caf/shmem/thread_support.h: Conditionally compile the types as required for Windows and other OSes.
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