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139 lines
2.7 KiB
Text
139 lines
2.7 KiB
Text
<!-- ##### SECTION Title ##### -->
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GstAtomic
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<!-- ##### SECTION Short_Description ##### -->
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Macros that implement atomic operations
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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GstAtomic contains a set of macros that can be used to implement
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atomic algorithms that are thread safe and don't use heavyweight
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locking mechanisms.
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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#GstMemChunk
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</para>
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<!-- ##### STRUCT GstAtomicInt ##### -->
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<para>
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A structure that contains an integer that can be modified
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atomically.
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</para>
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<!-- ##### MACRO GST_ATOMIC_INT_INIT ##### -->
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<para>
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Initialize an atomic int
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</para>
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@ref: a reference to a #GstAtomicInt
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@val: The initial value for the integer
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<!-- ##### MACRO GST_ATOMIC_INT_FREE ##### -->
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<para>
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Free the memory allocated by #GST_ATOMIC_INT_INIT
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</para>
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@ref: A reference to a #GstAtomicInt
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<!-- ##### MACRO GST_ATOMIC_INT_SET ##### -->
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<para>
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Set the value of a #GstAtomicInt atomically
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</para>
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@ref: a reference to a #GstAtomicInt
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@val: The value for the integer
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<!-- ##### MACRO GST_ATOMIC_INT_VALUE ##### -->
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<para>
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Get the value of a #GstAtomicInt atomically
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</para>
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@ref: a reference to a #GstAtomicInt
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<!-- ##### MACRO GST_ATOMIC_INT_READ ##### -->
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<para>
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Get the value of a #GstAtomicInt atomically into a variable
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</para>
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@ref: a reference to a #GstAtomicInt
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@res: a pointer to a gint to hold the value
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<!-- ##### MACRO GST_ATOMIC_INT_INC ##### -->
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<para>
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Increment the value of a #GstAtomicInt atomically
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</para>
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@ref: a reference to a #GstAtomicInt
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<!-- ##### MACRO GST_ATOMIC_INT_DEC_AND_TEST ##### -->
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<para>
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Decrement the value of a #GstAtomicInt atomically and test
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for zero.
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</para>
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@ref: a reference to a #GstAtomicInt
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@zero: a gpointer to a gboolean to hold the value of the test
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<!-- ##### MACRO GST_ATOMIC_INT_ADD ##### -->
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<para>
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Atomically add a value to a #GstAtomicInt
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</para>
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@ref: a reference to a #GstAtomicInt
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@count: The value to add
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<!-- ##### STRUCT GstAtomicSwap ##### -->
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<para>
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The structure to handle values that can be swapped atomically
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</para>
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@lock:
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<!-- ##### MACRO GST_ATOMIC_SWAP_VALUE ##### -->
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<para>
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Get the value of a #GstAtomicSwap
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</para>
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@swap: a reference to a #GstAtomicSwap
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<!-- ##### MACRO GST_ATOMIC_SWAP_INIT ##### -->
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<para>
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Initialize an atomic swap structure
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</para>
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@swap: a reference to a #GstAtomicSwap
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@val: the initial value
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<!-- ##### MACRO GST_ATOMIC_SWAP ##### -->
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<para>
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Atomically swap the value of the #GstAtomicSwap with a new value
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</para>
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@swap: a reference to a #GstAtomicSwap
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@val: the new value
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<!-- ##### MACRO GST_ATOMIC_SWAP_GET ##### -->
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<para>
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Atomically swap the value of the #GstAtomicSwap with a new value and
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get the old value.
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</para>
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@swap: a reference to a #GstAtomicSwap
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@val: the new value
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@res: the old value
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