3b11805964
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1919 bbd45198-f89e-11dd-88c7-29a3b14d5316
21 lines
730 B
C
21 lines
730 B
C
#ifndef __LINUX_RWSEM_H__
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#define __LINUX_RWSEM_H__
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// eCos does not have the concept of a read/write semaphore. So just
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// map them onto normal semaphores and hope we don't deadlock
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// somewhere.
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#include <asm/semaphore.h>
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struct rw_semaphore;
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#define down_read(sem) cyg_drv_mutex_lock((cyg_drv_mutex_t *)sem)
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#define down_read_trylock(sem) cyg_drv_mutex_trylock((cyg_drv_mutex_t *)sem)
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#define down_write(sem) cyg_drv_mutex_lock((cyg_drv_mutex_t *)sem)
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#define down_write_trylock(sem) cyg_drv_mutex_trylock((cyg_drv_mutex_t *)sem)
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#define up_read(sem) cyg_drv_mutex_unlock((cyg_drv_mutex_t *)sem)
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#define up_write(sem) cyg_drv_mutex_unlock((cyg_drv_mutex_t *)sem)
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#define downgrade_write(sem)
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#endif // __LINUX_RWSEM_H__
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