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Disable scrolling code for FreeBSD

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This is do to the fact that `fallocate(FALLOC_FL_PUNCH_HOLE)` is not
available under FreeBSD
This commit is contained in:
Alexander Sieg 2020-04-13 18:08:09 +02:00
parent de7c8467f0
commit fc8e51a4dc
1 changed files with 16 additions and 0 deletions
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16
shm.c
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@ -53,7 +53,9 @@ static off_t max_pool_size = 512 * 1024 * 1024;
static tll(struct buffer) buffers;
static bool can_punch_hole = false;
#ifdef __linux__
static bool can_punch_hole_initialized = false;
#endif
#undef MEASURE_SHM_ALLOCS
#if defined(MEASURE_SHM_ALLOCS)
@ -278,6 +280,7 @@ shm_get_buffer(struct wl_shm *shm, int width, int height, unsigned long cookie,
goto err;
}
#ifdef __linux__
if (!can_punch_hole_initialized) {
can_punch_hole_initialized = true;
can_punch_hole = fallocate(
@ -289,6 +292,9 @@ shm_get_buffer(struct wl_shm *shm, int width, int height, unsigned long cookie,
"supported (%s): expect lower performance", strerror(errno));
}
}
#elif __FreeBSD__
can_punch_hole = false;
#endif
if (scrollable && !can_punch_hole) {
initial_offset = 0;
@ -384,6 +390,7 @@ shm_can_scroll(const struct buffer *buf)
#endif
}
#ifdef __linux__
static bool
wrap_buffer(struct wl_shm *shm, struct buffer *buf, off_t new_offset)
{
@ -418,7 +425,9 @@ wrap_buffer(struct wl_shm *shm, struct buffer *buf, off_t new_offset)
buffer_destroy_dont_close(buf);
return instantiate_offset(shm, buf, new_offset);
}
#endif
#ifdef __linux__
static bool
shm_scroll_forward(struct wl_shm *shm, struct buffer *buf, int rows,
int top_margin, int top_keep_rows,
@ -522,7 +531,9 @@ err:
abort();
return false;
}
#endif
#ifdef __linux__
static bool
shm_scroll_reverse(struct wl_shm *shm, struct buffer *buf, int rows,
int top_margin, int top_keep_rows,
@ -616,12 +627,16 @@ err:
abort();
return false;
}
#endif
bool
shm_scroll(struct wl_shm *shm, struct buffer *buf, int rows,
int top_margin, int top_keep_rows,
int bottom_margin, int bottom_keep_rows)
{
#ifdef __FreeBSD__
return false;
#elif __linux__
if (!shm_can_scroll(buf))
return false;
@ -629,6 +644,7 @@ shm_scroll(struct wl_shm *shm, struct buffer *buf, int rows,
return rows > 0
? shm_scroll_forward(shm, buf, rows, top_margin, top_keep_rows, bottom_margin, bottom_keep_rows)
: shm_scroll_reverse(shm, buf, -rows, top_margin, top_keep_rows, bottom_margin, bottom_keep_rows);
#endif
}
void