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Kernel: Make Process::allocate_region*() return KResultOr<Region*>

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This allows region allocation to return specific errors and we don't
have to assume every failure is an ENOMEM.
This commit is contained in:
Andreas Kling 2021-01-15 17:27:52 +01:00
parent 7899e14e72
commit 64b0d89335
10 changed files with 70 additions and 79 deletions
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8
Kernel/SharedBuffer.cpp
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@ -94,10 +94,10 @@ void* SharedBuffer::ref_for_process_and_get_address(Process& process)
for (auto& ref : m_refs) {
if (ref.pid == process.pid()) {
if (!ref.region) {
auto* region = process.allocate_region_with_vmobject(VirtualAddress(), size(), m_vmobject, 0, "SharedBuffer", PROT_READ | (m_writable ? PROT_WRITE : 0), true);
if (!region)
return (void*)-ENOMEM;
ref.region = region;
auto region_or_error = process.allocate_region_with_vmobject(VirtualAddress(), size(), m_vmobject, 0, "SharedBuffer", PROT_READ | (m_writable ? PROT_WRITE : 0), true);
if (region_or_error.is_error())
return (void*)region_or_error.error().error();
ref.region = region_or_error.value();
}
ref.count++;
m_total_refs++;