5ae60510dc
This patch adds compile-time check for each message type to ensure the size is within the IPC assumptions. This will allow messages specific to a protocol to use from now on the proper types for each fields, while preventing from any unsuspected side effect when updating type definitions. Change-Id: Iad64f81a6b6726321fbc492ac37ceeaaa57aa6cd
37 lines
1.4 KiB
C
37 lines
1.4 KiB
C
#ifndef _IPC_CONST_H
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#define _IPC_CONST_H
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#include <machine/ipcconst.h>
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/* System call numbers that are passed when trapping to the kernel. */
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#define SEND 1 /* blocking send */
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#define RECEIVE 2 /* blocking receive */
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#define SENDREC 3 /* SEND + RECEIVE */
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#define NOTIFY 4 /* asynchronous notify */
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#define SENDNB 5 /* nonblocking send */
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#define MINIX_KERNINFO 6 /* request kernel info structure */
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#define SENDA 16 /* asynchronous send */
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#define IPCNO_HIGHEST SENDA
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/* Check that the message payload type doesn't grow past the maximum IPC payload size.
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* This is a compile time check. */
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#define _ASSERT_MSG_SIZE(msg_type) \
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typedef int _ASSERT_##msg_type[/* CONSTCOND */sizeof(msg_type) == 56 ? 1 : -1]
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/* Macros for IPC status code manipulation. */
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#define IPC_STATUS_CALL_SHIFT 0
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#define IPC_STATUS_CALL_MASK 0x3F
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#define IPC_STATUS_CALL(status) \
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(((status) >> IPC_STATUS_CALL_SHIFT) & IPC_STATUS_CALL_MASK)
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#define IPC_STATUS_CALL_TO(call) \
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(((call) & IPC_STATUS_CALL_MASK) << IPC_STATUS_CALL_SHIFT)
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#define IPC_FLG_MSG_FROM_KERNEL 1 /* this message originated in the kernel on
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behalf of a process, this is a trusted
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message, never reply to the sender
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*/
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#define IPC_STATUS_FLAGS_SHIFT 16
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#define IPC_STATUS_FLAGS(flgs) ((flgs) << IPC_STATUS_FLAGS_SHIFT)
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#define IPC_STATUS_FLAGS_TEST(status, flgs) \
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(((status) >> IPC_STATUS_FLAGS_SHIFT) & (flgs))
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#endif /* IPC_CONST_H */
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