Skip to content

dmview_demo: wait for a view on a card #17

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We鈥檒l occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
JohnAmadis merged 1 commit into from
Oct 11, 2026
Merged

dmview_demo: wait for a view on a card #17

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
22 changes: 15 additions & 7 deletions apps/dmview_demo/src/main.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -19,24 +19,32 @@
#define DEFAULT_VIEW "/eviews/dmview_demo/dmodos.dmv" /* dmod-boot: views of the flash modules */
#define WAIT_MS 100u
#define DISPLAY_WAIT_MS 10000u
#define VIEW_WAIT_MS 30000u /* A view on a card: until it is mounted */

int main(int argc, char* argv[])
{
const char* view = (argc > 1 && argv[1][0] != '\0') ? argv[1] : DEFAULT_VIEW;
const char* display = (argc > 2 && argv[2][0] != '\0') ? argv[2] : NULL;

if (!Dmod_FileAvailable(view))
{
Dmod_Printf("dmview_demo: no view %s\n", view);
Dmod_Printf("Usage: dmview_demo [<view>] [<display>]\n");
return -ENOENT;
}

dmosi_semaphore_t wakeup = dmosi_semaphore_create(0, 1);
if (wakeup == NULL)
return -ENOMEM;
libsystemd_set_stop_semaphore(wakeup);

/* Its view may be on a card mounted after it starts (automount): waited for */
for (uint32_t waited = 0; !Dmod_FileAvailable(view) && !libsystemd_stop_requested(); waited += WAIT_MS)
{
if (waited >= VIEW_WAIT_MS)
{
Dmod_Printf("dmview_demo: no view %s\n", view);
Dmod_Printf("Usage: dmview_demo [<view>] [<display>]\n");
libsystemd_set_stop_semaphore(NULL);
dmosi_semaphore_destroy(wakeup);
return -ENOENT;
}
(void)dmosi_semaphore_wait(wakeup, 1, (int32_t)WAIT_MS);
}

uint32_t claim = 0;
int ret = -ENODEV;
for (uint32_t waited = 0; !libsystemd_stop_requested(); waited += WAIT_MS)
Expand Down
Loading