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Kernel: Merge the shbuf_get_size() syscall into shbuf_get()

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Add an extra out-parameter to shbuf_get() that receives the size of the
shared buffer. That way we don't need to make a separate syscall to
get the size, which we always did immediately after.
This commit is contained in:
Andreas Kling 2020-02-28 12:29:14 +01:00
parent a1514369d7
commit dcd619bd46
6 changed files with 13 additions and 36 deletions
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8
AK/SharedBuffer.cpp
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@ -67,16 +67,12 @@ bool SharedBuffer::share_globally()
RefPtr<SharedBuffer> SharedBuffer::create_from_shbuf_id(int shbuf_id)
{
void* data = shbuf_get(shbuf_id);
size_t size = 0;
void* data = shbuf_get(shbuf_id, &size);
if (data == (void*)-1) {
perror("shbuf_get");
return nullptr;
}
int size = shbuf_get_size(shbuf_id);
if (size < 0) {
perror("shbuf_get_size");
return nullptr;
}
return adopt(*new SharedBuffer(shbuf_id, size, data));
}