Viewing file:  isl_ctx.c (8.66 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* Copyright 2008-2009 Katholieke Universiteit Leuven
*
* Use of this software is governed by the MIT license
*
* Written by Sven Verdoolaege, K.U.Leuven, Departement
* Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
*/
#include <isl_ctx_private.h>
#include <isl/vec.h>
#include <isl_options_private.h>
#define __isl_calloc(type,size) ((type *)calloc(1, size))
#define __isl_calloc_type(type) __isl_calloc(type,sizeof(type))
/* Construct an isl_stat indicating whether "obj" is non-NULL.
*
* That is, return isl_stat_ok if "obj" is non_NULL and
* isl_stat_error otherwise.
*/
isl_stat isl_stat_non_null(void *obj)
{
if (obj != NULL)
return isl_stat_ok;
return isl_stat_error;
}
/* Return the negation of "b", where the negation of isl_bool_error
* is isl_bool_error again.
*/
isl_bool isl_bool_not(isl_bool b)
{
if (b < 0)
return isl_bool_error;
if (b == isl_bool_false)
return isl_bool_true;
return isl_bool_false;
}
/* Create an isl_bool from an integer.
*
* Return isl_bool_false if b is zero, otherwise return isl_bool_true.
* This function never returns isl_bool_error.
*/
isl_bool isl_bool_ok(int b)
{
if (b)
return isl_bool_true;
return isl_bool_false;
}
/* Check that the result of an allocation ("p") is not NULL and
* complain if it is.
* The only exception is when allocation size ("size") is equal to zero.
*/
static void *check_non_null(isl_ctx *ctx, void *p, size_t size)
{
if (p || size == 0)
return p;
isl_die(ctx, isl_error_alloc, "allocation failure", return NULL);
}
/* Prepare for performing the next "operation" in the context.
* Return 0 if we are allowed to perform this operation and
* return -1 if we should abort the computation.
*
* In particular, we should stop if the user has explicitly aborted
* the computation or if the maximal number of operations has been exceeded.
*/
int isl_ctx_next_operation(isl_ctx *ctx)
{
if (!ctx)
return -1;
if (ctx->abort) {
isl_ctx_set_error(ctx, isl_error_abort);
return -1;
}
if (ctx->max_operations && ctx->operations >= ctx->max_operations)
isl_die(ctx, isl_error_quota,
"maximal number of operations exceeded", return -1);
ctx->operations++;
return 0;
}
/* Call malloc and complain if it fails.
* If ctx is NULL, then return NULL.
*/
void *isl_malloc_or_die(isl_ctx *ctx, size_t size)
{
if (isl_ctx_next_operation(ctx) < 0)
return NULL;
return ctx ? check_non_null(ctx, malloc(size), size) : NULL;
}
/* Call calloc and complain if it fails.
* If ctx is NULL, then return NULL.
*/
void *isl_calloc_or_die(isl_ctx *ctx, size_t nmemb, size_t size)
{
if (isl_ctx_next_operation(ctx) < 0)
return NULL;
return ctx ? check_non_null(ctx, calloc(nmemb, size), nmemb) : NULL;
}
/* Call realloc and complain if it fails.
* If ctx is NULL, then return NULL.
*/
void *isl_realloc_or_die(isl_ctx *ctx, void *ptr, size_t size)
{
if (isl_ctx_next_operation(ctx) < 0)
return NULL;
return ctx ? check_non_null(ctx, realloc(ptr, size), size) : NULL;
}
/* Keep track of all information about the current error ("error", "msg",
* "file", "line") in "ctx".
*/
void isl_ctx_set_full_error(isl_ctx *ctx, enum isl_error error, const char *msg,
const char *file, int line)
{
if (!ctx)
return;
ctx->error = error;
ctx->error_msg = msg;
ctx->error_file = file;
ctx->error_line = line;
}
void isl_handle_error(isl_ctx *ctx, enum isl_error error, const char *msg,
const char *file, int line)
{
if (!ctx)
return;
isl_ctx_set_full_error(ctx, error, msg, file, line);
switch (ctx->opt->on_error) {
case ISL_ON_ERROR_WARN:
fprintf(stderr, "%s:%d: %s\n", file, line, msg);
return;
case ISL_ON_ERROR_CONTINUE:
return;
case ISL_ON_ERROR_ABORT:
fprintf(stderr, "%s:%d: %s\n", file, line, msg);
abort();
return;
}
}
static struct isl_options *find_nested_options(struct isl_args *args,
void *opt, struct isl_args *wanted)
{
int i;
struct isl_options *options;
if (args == wanted)
return opt;
for (i = 0; args->args[i].type != isl_arg_end; ++i) {
struct isl_arg *arg = &args->args[i];
void *child;
if (arg->type != isl_arg_child)
continue;
if (arg->offset == ISL_ARG_OFFSET_NONE)
child = opt;
else
child = *(void **)(((char *)opt) + arg->offset);
options = find_nested_options(arg->u.child.child,
child, wanted);
if (options)
return options;
}
return NULL;
}
static struct isl_options *find_nested_isl_options(struct isl_args *args,
void *opt)
{
return find_nested_options(args, opt, &isl_options_args);
}
void *isl_ctx_peek_options(isl_ctx *ctx, struct isl_args *args)
{
if (!ctx)
return NULL;
if (args == &isl_options_args)
return ctx->opt;
return find_nested_options(ctx->user_args, ctx->user_opt, args);
}
isl_ctx *isl_ctx_alloc_with_options(struct isl_args *args, void *user_opt)
{
struct isl_ctx *ctx = NULL;
struct isl_options *opt = NULL;
int opt_allocated = 0;
if (!user_opt)
return NULL;
opt = find_nested_isl_options(args, user_opt);
if (!opt) {
opt = isl_options_new_with_defaults();
if (!opt)
goto error;
opt_allocated = 1;
}
ctx = __isl_calloc_type(struct isl_ctx);
if (!ctx)
goto error;
if (isl_hash_table_init(ctx, &ctx->id_table, 0))
goto error;
ctx->stats = isl_calloc_type(ctx, struct isl_stats);
if (!ctx->stats)
goto error;
ctx->user_args = args;
ctx->user_opt = user_opt;
ctx->opt_allocated = opt_allocated;
ctx->opt = opt;
ctx->ref = 0;
isl_int_init(ctx->zero);
isl_int_set_si(ctx->zero, 0);
isl_int_init(ctx->one);
isl_int_set_si(ctx->one, 1);
isl_int_init(ctx->two);
isl_int_set_si(ctx->two, 2);
isl_int_init(ctx->negone);
isl_int_set_si(ctx->negone, -1);
isl_int_init(ctx->normalize_gcd);
ctx->n_cached = 0;
ctx->n_miss = 0;
isl_ctx_reset_error(ctx);
ctx->operations = 0;
isl_ctx_set_max_operations(ctx, ctx->opt->max_operations);
return ctx;
error:
isl_args_free(args, user_opt);
if (opt_allocated)
isl_options_free(opt);
free(ctx);
return NULL;
}
struct isl_ctx *isl_ctx_alloc()
{
struct isl_options *opt;
opt = isl_options_new_with_defaults();
return isl_ctx_alloc_with_options(&isl_options_args, opt);
}
void isl_ctx_ref(struct isl_ctx *ctx)
{
ctx->ref++;
}
void isl_ctx_deref(struct isl_ctx *ctx)
{
isl_assert(ctx, ctx->ref > 0, return);
ctx->ref--;
}
/* Print statistics on usage.
*/
static void print_stats(isl_ctx *ctx)
{
fprintf(stderr, "operations: %lu\n", ctx->operations);
}
void isl_ctx_free(struct isl_ctx *ctx)
{
if (!ctx)
return;
if (ctx->ref != 0)
isl_die(ctx, isl_error_invalid,
"isl_ctx freed, but some objects still reference it",
return);
if (ctx->opt->print_stats)
print_stats(ctx);
isl_hash_table_clear(&ctx->id_table);
isl_blk_clear_cache(ctx);
isl_int_clear(ctx->zero);
isl_int_clear(ctx->one);
isl_int_clear(ctx->two);
isl_int_clear(ctx->negone);
isl_int_clear(ctx->normalize_gcd);
isl_args_free(ctx->user_args, ctx->user_opt);
if (ctx->opt_allocated)
isl_options_free(ctx->opt);
free(ctx->stats);
free(ctx);
}
struct isl_options *isl_ctx_options(isl_ctx *ctx)
{
if (!ctx)
return NULL;
return ctx->opt;
}
enum isl_error isl_ctx_last_error(isl_ctx *ctx)
{
return ctx ? ctx->error : isl_error_invalid;
}
/* Return the error message of the last error in "ctx".
*/
const char *isl_ctx_last_error_msg(isl_ctx *ctx)
{
return ctx ? ctx->error_msg : NULL;
}
/* Return the file name where the last error in "ctx" occurred.
*/
const char *isl_ctx_last_error_file(isl_ctx *ctx)
{
return ctx ? ctx->error_file : NULL;
}
/* Return the line number where the last error in "ctx" occurred.
*/
int isl_ctx_last_error_line(isl_ctx *ctx)
{
return ctx ? ctx->error_line : -1;
}
void isl_ctx_reset_error(isl_ctx *ctx)
{
if (!ctx)
return;
ctx->error = isl_error_none;
ctx->error_msg = NULL;
ctx->error_file = NULL;
ctx->error_line = -1;
}
void isl_ctx_set_error(isl_ctx *ctx, enum isl_error error)
{
isl_ctx_set_full_error(ctx, error, NULL, NULL, -1);
}
void isl_ctx_abort(isl_ctx *ctx)
{
if (ctx)
ctx->abort = 1;
}
void isl_ctx_resume(isl_ctx *ctx)
{
if (ctx)
ctx->abort = 0;
}
int isl_ctx_aborted(isl_ctx *ctx)
{
return ctx ? ctx->abort : -1;
}
int isl_ctx_parse_options(isl_ctx *ctx, int argc, char **argv, unsigned flags)
{
if (!ctx)
return -1;
return isl_args_parse(ctx->user_args, argc, argv, ctx->user_opt, flags);
}
/* Set the maximal number of iterations of "ctx" to "max_operations".
*/
void isl_ctx_set_max_operations(isl_ctx *ctx, unsigned long max_operations)
{
if (!ctx)
return;
ctx->max_operations = max_operations;
}
/* Return the maximal number of iterations of "ctx".
*/
unsigned long isl_ctx_get_max_operations(isl_ctx *ctx)
{
return ctx ? ctx->max_operations : 0;
}
/* Reset the number of operations performed by "ctx".
*/
void isl_ctx_reset_operations(isl_ctx *ctx)
{
if (!ctx)
return;
ctx->operations = 0;
}
|
