Baguette/catpoint
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Do not mmap all slides at the beginning to scale better.

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Without mmaping all slides at the beginning, catpoint scales better
and the whole internal algorithms are simplified.
This commit is contained in:
Christoph Lohmann 2020-12-20 15:25:52 +01:00
parent 5672cc0e59
commit b0efd23c24
1 changed files with 27 additions and 28 deletions
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55
catpoint.c
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@ -13,52 +13,57 @@
#include <locale.h>
#include <signal.h>
char **slides, **slidefiles; /* the slides */
int nslides, currentslide;
char *currentslidep, **slidefiles; /* the slides */
int nslides, currentslide, currentslidelen;
void
unloadcurrentslide(void)
{
if (currentslidep == NULL)
return;
if (munmap(currentslidep, currentslidelen) < 0)
err(1, "munmap: %s", slidefiles[currentslide]);
}
void
cleanup(int sig)
{
int i;
for (i = 0; i < nslides; i++)
munmap(slides[i], 0x1000);
unloadcurrentslide();
endwin(); /* restore terminal */
exit(1);
}
void
reload(char **argv, int i)
loadcurrentslide(char **argv, int slide)
{
struct stat statbuf;
int fd;
if (slides[i] != NULL) {
if (munmap(slides[i], 0x1000) < 0)
err(1, "munmap: %s", slidefiles[i]);
}
unloadcurrentslide();
fd = open(slidefiles[i], O_RDONLY, 0);
fd = open(slidefiles[slide], O_RDONLY, 0);
if (fd < 0)
err(1, "open: %s", slidefiles[i]);
err(1, "open: %s", slidefiles[slide]);
if (fstat(fd, &statbuf) < 0)
err(1, "fstat: %s", slidefiles[i]);
slides[i] = mmap(NULL, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (slides[i] == MAP_FAILED)
err(1, "fstat: %s", slidefiles[slide]);
currentslidep = mmap(NULL, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (currentslidep == MAP_FAILED)
err(1, "mmap");
currentslidelen = statbuf.st_size;
close(fd);
}
void
reloadcurrentslide(int sig)
{
reload(slidefiles, currentslide);
loadcurrentslide(slidefiles, currentslide);
if (sig == SIGHUP) {
clear();
refresh();
printw("%s", slides[currentslide]);
printw("%s", currentslidep);
}
}
@ -69,8 +74,6 @@ setsignal()
signal(SIGINT, cleanup);
signal(SIGQUIT, cleanup);
signal(SIGABRT, cleanup);
signal(SIGKILL, cleanup);
signal(SIGTERM, cleanup);
}
@ -87,15 +90,10 @@ main(int argc, char *argv[])
setsignal();
setlocale(LC_ALL, "");
slides = calloc(nslides, sizeof(char *));
/* map files to mem */
for (currentslide = 0; slidefiles[currentslide] != NULL;
currentslide++) {
reload(slidefiles, currentslide);
}
/* start */
currentslide = 0;
currentslidep = NULL;
currentslidelen = 0;
/* init curses */
initscr();
@ -108,9 +106,10 @@ main(int argc, char *argv[])
show:
/* display slide */
loadcurrentslide(slidefiles, currentslide);
clear();
refresh();
printw("%s", slides[currentslide]);
printw("%s", currentslidep);
again:
c = getch();