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Attempt to free plot data entries in each call to create_plot_info()

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In profile.c:create_plot_info(), store the last address in which
memory was allocated for the plot data entries in the static
variable "last_pi_entry". If "last_pi_entry" isn't a NULL
pointer in each call to create_plot_info(), free memory at that
address.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Lubomir I. Ivanov 2012-12-17 02:37:44 +02:00 • committed by Dirk Hohndel
parent 5c65ed2390
commit 33ae98c96f
1 changed files with 5 additions and 2 deletions
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7
profile.c
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@ -22,6 +22,7 @@ int selected_dive = 0;
char zoomed_plot = 0;
static double plot_scale = SCALE_SCREEN;
static struct plot_data *last_pi_entry = NULL;
#define cairo_set_line_width_scaled(cr, w) \
cairo_set_line_width((cr), (w) * plot_scale);
@ -1525,7 +1526,9 @@ static struct plot_info *create_plot_info(struct dive *dive, struct divecomputer
/* we want to potentially add synthetic plot_info elements for the gas changes */
nr = dc->samples + 4 + 2 * count_gas_change_events(dc);
pi->entry = calloc(nr, sizeof(struct plot_data));
if (last_pi_entry)
free((void *)last_pi_entry);
last_pi_entry = pi->entry = calloc(nr, sizeof(struct plot_data));
if (!pi->entry)
return NULL;
pi->nr = nr;
@ -1879,7 +1882,7 @@ void plot(struct graphics_context *gc, struct dive *dive, scale_mode_t scale)
if (gc->printer) {
free(pi->entry);
pi->entry = NULL;
last_pi_entry = pi->entry = NULL;
pi->nr = 0;
}
}