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Kernel: Add a simple shared memory API for two processes only.

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And use this to implement shared bitmaps between WindowServer and clients.
This commit is contained in:
Andreas Kling 2019-02-16 12:13:43 +01:00
parent 4db78dabd3
commit 4ea28bf0a5
13 changed files with 240 additions and 48 deletions
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18
LibC/unistd.cpp
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@ -348,4 +348,22 @@ int read_tsc(unsigned* lsw, unsigned* msw)
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int create_shared_buffer(pid_t peer_pid, size_t size, void** buffer)
{
int rc = syscall(SC_create_shared_buffer, peer_pid, size, buffer);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
void* get_shared_buffer(int shared_buffer_id)
{
int rc = syscall(SC_get_shared_buffer, shared_buffer_id);
__RETURN_WITH_ERRNO(rc, (void*)rc, (void*)-1);
}
int release_shared_buffer(int shared_buffer_id)
{
int rc = syscall(SC_release_shared_buffer, shared_buffer_id);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
}