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ba18c1ecc6
the motivation for this change is twofold. first, it gets the fallback logic out of the dynamic linker, improving code readability and organization. second, it provides application code that wants to use the membarrier syscall, which depends on preregistration of intent before the process becomes multithreaded unless unbounded latency is acceptable, with a symbol that, when linked, ensures that this registration happens.
18 lines
510 B
C
18 lines
510 B
C
#ifndef _SYS_MEMBARRIER_H
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#define _SYS_MEMBARRIER_H
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#define MEMBARRIER_CMD_QUERY 0
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#define MEMBARRIER_CMD_GLOBAL 1
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#define MEMBARRIER_CMD_GLOBAL_EXPEDITED 2
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#define MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED 4
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#define MEMBARRIER_CMD_PRIVATE_EXPEDITED 8
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#define MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED 16
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#define MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE 32
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#define MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE 64
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#define MEMBARRIER_CMD_SHARED MEMBARRIER_CMD_GLOBAL
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int membarrier(int, int);
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#endif
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