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openmp: Retire nest-var ICV for OpenMP 5.1

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This removes the nest-var ICV, expressing nesting in terms of the
max-active-levels-var ICV instead.  The max-active-levels-var ICV
is now per data environment rather than per device.

2020-11-18  Kwok Cheung Yeung  <kcy@codesourcery.com>

	libgomp/
	* env.c (gomp_global_icv): Remove nest_var field.  Add
	max_active_levels_var field.
	(gomp_max_active_levels_var): Remove.
	(parse_boolean): Return true on success.
	(handle_omp_display_env): Express OMP_NESTED in terms of
	max_active_levels_var.  Change format specifier for
	max_active_levels_var.
	(initialize_env): Set max_active_levels_var from
	OMP_MAX_ACTIVE_LEVELS, OMP_NESTED, OMP_NUM_THREADS and
	OMP_PROC_BIND.
	* icv.c (omp_set_nested): Express in terms of
	max_active_levels_var.
	(omp_get_nested): Likewise.
	(omp_set_max_active_levels): Use max_active_levels_var field instead
	of gomp_max_active_levels_var.
	(omp_get_max_active_levels): Likewise.
	* libgomp.h (struct gomp_task_icv): Remove nest_var field.  Add
	max_active_levels_var field.
	(gomp_supported_active_levels): Set to UCHAR_MAX.
	(gomp_max_active_levels_var): Delete.
	* libgomp.texi (omp_get_nested): Update documentation.
	(omp_set_nested): Likewise.
	(OMP_MAX_ACTIVE_LEVELS): Likewise.
	(OMP_NESTED): Likewise.
	(OMP_NUM_THREADS): Likewise.
	(OMP_PROC_BIND): Likewise.
	* parallel.c (gomp_resolve_num_threads): Replace reference
	to nest_var with max_active_levels_var.  Use max_active_levels_var
	field instead of gomp_max_active_levels_var.
This commit is contained in:
Kwok Cheung Yeung
2020-11-18 11:24:36 -08:00
parent 965e0cc371
commit 6fae7eda96
5 changed files with 90 additions and 40 deletions
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5
libgomp/libgomp.h
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@@ -428,7 +428,7 @@ struct gomp_task_icv
int default_device_var;
unsigned int thread_limit_var;
bool dyn_var;
bool nest_var;
unsigned char max_active_levels_var;
char bind_var;
/* Internal ICV. */
struct target_mem_desc *target_data;
@@ -441,13 +441,12 @@ enum gomp_target_offload_t
GOMP_TARGET_OFFLOAD_DISABLED
};
#define gomp_supported_active_levels INT_MAX
#define gomp_supported_active_levels UCHAR_MAX
extern struct gomp_task_icv gomp_global_icv;
#ifndef HAVE_SYNC_BUILTINS
extern gomp_mutex_t gomp_managed_threads_lock;
#endif
extern unsigned long gomp_max_active_levels_var;
extern bool gomp_cancel_var;
extern enum gomp_target_offload_t gomp_target_offload_var;
extern int gomp_max_task_priority_var;