#include "acpi.h"
#include "accommon.h"

Include dependency graph for utlock.c:

Macros
#define	_COMPONENT ACPI_UTILITIES

Macro Definition Documentation

◆ _COMPONENT

#define _COMPONENT ACPI_UTILITIES

Definition at line 48 of file utlock.c.

Function Documentation

◆ AcpiUtAcquireReadLock()

ACPI_STATUS AcpiUtAcquireReadLock ( ACPI_RW_LOCK * Lock )

Definition at line 117 of file utlock.c.

{
    ACPI_STATUS             Status;
 
 
    Status = AcpiOsAcquireMutex (Lock->ReaderMutex, ACPI_WAIT_FOREVER);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }
 
    /* Acquire the write lock only for the first reader */
 
    Lock->NumReaders++;
    if (Lock->NumReaders == 1)
    {
        Status = AcpiOsAcquireMutex (Lock->WriterMutex, ACPI_WAIT_FOREVER);
    }
 
    AcpiOsReleaseMutex (Lock->ReaderMutex);
    return (Status);
}

Referenced by AcpiWalkNamespace().

◆ AcpiUtAcquireWriteLock()

ACPI_STATUS AcpiUtAcquireWriteLock ( ACPI_RW_LOCK * Lock )

Definition at line 185 of file utlock.c.

{
    ACPI_STATUS             Status;
 
 
    Status = AcpiOsAcquireMutex (Lock->WriterMutex, ACPI_WAIT_FOREVER);
    return (Status);
}

Referenced by AcpiTbDeleteNamespaceByOwner().

◆ AcpiUtCreateRwLock()

ACPI_STATUS AcpiUtCreateRwLock ( ACPI_RW_LOCK * Lock )

Definition at line 66 of file utlock.c.

{
    ACPI_STATUS             Status;
 
 
    Lock->NumReaders = 0;
    Status = AcpiOsCreateMutex (&Lock->ReaderMutex);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }
 
    Status = AcpiOsCreateMutex (&Lock->WriterMutex);
    return (Status);
}

Referenced by AcpiUtMutexInitialize().

◆ AcpiUtDeleteRwLock()

void AcpiUtDeleteRwLock ( ACPI_RW_LOCK * Lock )

Definition at line 85 of file utlock.c.

{
 
    AcpiOsDeleteMutex (Lock->ReaderMutex);
    AcpiOsDeleteMutex (Lock->WriterMutex);
 
    Lock->NumReaders = 0;
    Lock->ReaderMutex = NULL;
    Lock->WriterMutex = NULL;
}

Referenced by AcpiUtMutexTerminate().

◆ AcpiUtReleaseReadLock()

ACPI_STATUS AcpiUtReleaseReadLock ( ACPI_RW_LOCK * Lock )

Definition at line 143 of file utlock.c.

{
    ACPI_STATUS             Status;
 
 
    Status = AcpiOsAcquireMutex (Lock->ReaderMutex, ACPI_WAIT_FOREVER);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }
 
    /* Release the write lock only for the very last reader */
 
    Lock->NumReaders--;
    if (Lock->NumReaders == 0)
    {
        AcpiOsReleaseMutex (Lock->WriterMutex);
    }
 
    AcpiOsReleaseMutex (Lock->ReaderMutex);
    return (Status);
}

Referenced by AcpiWalkNamespace().

◆ AcpiUtReleaseWriteLock()

void AcpiUtReleaseWriteLock ( ACPI_RW_LOCK * Lock )

Definition at line 197 of file utlock.c.

{
 
    AcpiOsReleaseMutex (Lock->WriterMutex);
}