30 lines
1.1 KiB
C
30 lines
1.1 KiB
C
#ifndef _IPC_CONST_H
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#define _IPC_CONST_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 SENDA 16 /* asynchronous send */
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#define IPCNO_HIGHEST SENDA
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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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