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Add bailout code to prevent infinite loop in deco calculation

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This appears to happen if we have impossible dive sequences in the
dive_list (i.e., merging XML files from two different divers with
overlapping trips).

We need to fix the underlying cause for this issue (i.e., only pick the
'right' dives to calculate the residual tissue saturation), but at least
this code prevents the hang in an infinite loop.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Dirk Hohndel 2013-01-07 13:50:53 -08:00
parent e6afd055d8
commit e47e37e5a6
1 changed files with 7 additions and 0 deletions
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7
deco.c
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@ -273,6 +273,7 @@ unsigned int deco_allowed_depth(double tissues_tolerance, double surface_pressur
double new_gradient_factor;
double pressure_delta = tissues_tolerance - surface_pressure;
struct dive_data mydata;
int bail = 1000;
if (pressure_delta > 0) {
if (!smooth) {
@ -291,6 +292,12 @@ unsigned int deco_allowed_depth(double tissues_tolerance, double surface_pressur
below_gradient_limit = (new_gradient_factor < actual_gradient_limit(&mydata));
while(!below_gradient_limit)
{
/* we run into bugs where this turns into an infinite loop; so add
* some bailout code that prints a warning but prevents the code from hanging */
if (--bail == 0) {
printf("WARNING!!!\n==========\nThe deco_allowed_depth() loop appears to hang.\nBailing out.\n");
break;
}
if (!smooth)
mydata.pressure += PRESSURE_CHANGE_3M;
else