Directive Name |
Description |
parallel |
Defines a parallel region. |
for |
Identifies an iterative work-sharing construct that specifies a region
in which the iterations of the associated loop should be executed in parallel. |
sections |
Identifies a non-iterative work-sharing construct that specifies a
set of constructs that are to be divided among threads in a team. |
single |
Identifies a construct that specifies that the associated structured
block is executed by only one thread in the team. |
parallel for |
A shortcut for a parallel region that contains
a single for directive. The
parallel
or for
OpenMP directive must be immediately followed by a for
statement. If you place other statement or an OpenMP directive between
the parallel
or for
directive and the for statement, the Intel C++ Compiler issues a
syntax error. |
parallel sections |
Provides a shortcut form for specifying a parallel region containing
a single sections directive. |
master |
Identifies a construct that specifies a structured block that is executed
by the master thread of the team. |
critical[lock] |
Identifies a construct that restricts execution of the associated structured
block to a single thread at a time. |
barrier |
Synchronizes all the threads in a team. |
atomic |
Ensures that a specific memory location is updated atomically. |
flush |
Specifies a "cross-thread" sequence point at which the implementation
is required to ensure that all the threads in a team have a consistent
view of certain objects in memory. |
ordered |
The structured block following an ordered directive
is executed in the order in which iterations would be executed in a sequential
loop. |
threadprivate |
Makes the named file-scope or namespace-scope variables specified private
to a thread but file-scope visible within the thread. |
Clause |
Description |
private |
Declares variables to be private to each thread
in a team. |
firstprivate |
Provides a superset of the functionality provided by the private
clause. |
lastprivate |
Provides a superset of the functionality provided by the private
clause. |
shared |
Shares variables among all the threads in a team. |
default |
Enables you to affect the data-scope attributes of variables. |
reduction |
Performs a reduction on scalar variables. |
ordered |
The structured block following an ordered directive
is executed in the order in which iterations would be executed in a sequential
loop. |
if |
If the if(scalar_logical_expression) clause
is present, the enclosed code block is executed in parallel only if the
scalar_logical_expression evaluates to TRUE.
Otherwise the code block is serialized. |
schedule |
Specifies how iterations of the for loop are
divided among the threads of the team. |
copyin |
Provides a mechanism to assign the same name to threadprivate
variables for each thread in the team executing the parallel region. |